English number word list - Word и Excel - помощь в работе с программами

Numbers Vocabulary: Numbers play an important role in our day-to-day life. Numbers are used to counting, measure something. There are different types of numbers such as roman numbers, natural numbers, ordinal numbers, decimal numbers, etc. Learn the numbers vocabulary in English from this page. Without knowing the numbers we cannot perform arithmetic operations like addition, subtraction, multiplication, and division. In this article children can learn how to write numbers in words, Ordinal numbers, etc.

Study the most important English Vocabulary Words identified by our experts and learn the right vocabulary to use in your day to day conversations.

How to Write Numbers in English Words

Number Chart
How to Write Numbers in English
Ordinal Numbers
Numbers Vocabulary

Numbers Chart

Number chart is the representation of numbers in systematic order. You can find the natural numbers, even numbers, odd numbers, prime numbers from the number chart. Here you can learn how to write the numbers in words from 1 to 100.

How to Write Numbers in Words: Percentage, Decimal, Fractions, Temperature

49 – The number can be read as forty nine.
10% – The number can be read as Ten Percent
20% – The number can be read as Twenty Percent
25% – The number can be read as Twenty Five Percent
1/3 – The fraction can be read as one-third
1/2 – The fraction can be read as One by 2 or one half.
1947 – The number can be read as One Thousand Nine Hundred and Forty-Seven.
1996 – The number can be read as One Thousand Nine Hundred and Ninety-Six
200 – Two Hundred
16 – The number can be read as Sixteen
3rd – Can be Read as Third
12°C – Twelve Degrees Celcius
59° – Fifty-Nine Degrees

Ordinal Numbers in Words | Numbers Vocabulary

Ordinal Numbers designate the position of the number or something in the list. For example, we will find the order of ranks in the ordinal numbers like 1st rank, second rank, third rank, fourth rank, ….. Most of the ordinal numbers end with ‘th’ except for 1, 2 and 3.

Numbers Vocabulary

Learn Numbers Vocabulary in English from here. This will improve your skills to communicate with others.

Источник

English Vocabulary Word List — Numbers 1 to 20

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Ordinal Numbers

We use numbers to count things. Numbers we use to count things are called cardinal numbers.

Here are the English words for the numbers 1-10.

Click on the words to hear them spoken. Listen, and say the words out loud.

one

two

three

four

five

six

seven

eight

nine

10.

ten

Here are the English words for the numbers 11-20.

Click on the words to hear them spoken. Listen, and say the words out loud.

11.

eleven

12.

twelve

13.

thirteen

14.

fourteen

15.

fifteen

16.

sixteen

17.

seventeen

18.

eighteen

19.

nineteen

20.

twenty

Источник

Числовой английский словарь

2015-07-04

Любой язык состоит не только из существительных, глаголов, прилагательных, наречий, но и числительных.Их учат с самых первых дней занятий на интенсивных курсах английского языка онлайн и очно. One, two, three, four, five, six, seven, eight, nine, ten… Казалось бы, всё так просто. Но далее начинаются года. С 11 до 21 веков приходится произносить парами цифр: 1917 – nineteen seventeen, дальше круче: 1905 – nineteen oh five. А в первом десятилетии 21 века уже читаем иначе: 2005 – two thousand five. А как читать 1900? 1800s? Дальше придётся иметь дело с «нулевыми» 00s. .Кроме годов есть ещё дроби, проценты (в английском мы говорим “percent” без «s»), степени.

Также множественное число отсутствует в конкретных сотнях, тысячах, миллионах, что имеет место быть в русском. И немало бывает затруднительных комбинаций с цифрами. И ведь, как назло, словари подсказывают, как пишутся слова, начинающиеся на буквы. Где же взять словарь, где в алфавитном порядке были бы «цифровые» слова. Как правильно сказать «агент 007», «двухтысячные», «2 в квадрате»? Ну, вот и хочется сказать: Есть такой словарь, он перед вами. Он подскажет, что в современном литературном английском языке порядковое числительное от 21 будет twenty-first, а не twenty-oneth. Научит читать большие числа короткой шкалы, цены. Напомнит, что в слове «forty» нет буквы «u», в «ninth» отсутствует «e», в «eighteen» только одна «t».

Этот краткий словарик даёт понятие об основных правилах произнесения числительных. Многое образуется по аналогии. Всего десять страниц. Не грех выучить всё. И тогда любое число будет вам подвластно.

Numbers to words

=0=
- $0.60 – sixty cents
- 0 – zero, oh, nought, nil
- 0s – zeros, noughts, nils
- 00 – double oh
- 00s — noughties
- 007 – (spelled, agent)double oh seven
- 0.005 – nought point zero zero five; zero point zero zero five
- 0.05 – nought point oh five, zero point oh five
- 0.15 — — nought point one five, zero point one five
- 0.2 — — nought point two, zero point two
- 0.5 — nought point five, zero point five, a half
- 0.543 — nought point five four three, zero point five four three
=1=
- $1.40 – one dollar forty cents; one dollar forty
- 1 — one
- 1s — ones
- 1st — first
- 1sts – firsts
- 1.5% — one and a half percent; one point five percent
- 1/ 2 – a half
- 1/3 – a third
- 1/4 — a quarter
- 1/5 – a fifth
- 1/6 – a sixth
- 1 1/2 — one and a half
- 10 –ten; metric dozen
- 10% — ten percent
- 10s — tens
- 10 th — tenth
- 100 – one hundred, a hundred
- 100% — one hundred per cent , a hundred percent
- 100s — hundreds
- 100th – one hundreds
- 1000 – one thousand, a thousand, 1K
- 1000s — thousands
- 1000th – one thousandth
- 10,000 – ten thousand, a myriad
- 10,000th – ten thousandth
- 100,000 – one hundred thousand
- 1000,000 – one million
- 1000,000th – one millionth
- 10,000,000 – ten million
- 100,000,000 – one hundred million
- 1000,000,000 — one billion
- 1000,000,000,000 — one trillion
- 1000,000,000,000,000 – one quadrillion
- 1,000,000,000,000,000,000 – one quintillion
- 1,000,000,000,000,000,000,000 – one sextillion
- 1,000,000,000,000,000,000,000,000 – one septillion
- 1,000,000,000,000,000,000,000,000,000 – one octillion
- 1,000,000,000,000,000,000,000,000,000,000 – one nonillion
- 1,000,000,000,000,000,000,000,000,000,000,000 – one decillion
- 1,000,000,000,000,000,000,000,000,000,000,000,000 – one undecillion
- 10^63 – one vigintillion; ten to the power of 63
- 10^93 — one trigintillion
- 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 ; 10^100 – googol
- 10^303 — one centillion
- 10^393 – one trigintacentillion
- 10^3003 – one millinillion
- 10^Googol (10^10^100) — googolplex
- 101 – one hundred and one, one oh one
- 11 — eleven
- 11th — eleventh
- 1:15 – one fifteen, quarter past/after one
- 12 – twelve, dozen
- 120 – one hundred and twenty; small gross; great hundred
- 1,200,000 — one point two million
- 12th — twelfth
- 13 – thirteen, baker’s dozen
- 13th – thirteenth
- 1:30 (time) one thirty, half past one
- 14 – fourteen
- 144 – one hundred and forty-four; gross
- 14th — fourteenth
- 1:45 (time) one fourty-five, quarter to two
- 15 — fifteen
- 15th — fifteenth
- 16 — sixteen
- 16th — sixteenth
- 17 — seventeen
- 17th — seventeenth
- 18 — eighteen
- 18th — eighteenth
- 1800 – (number) one thousand eight hundred, eighteen hundred, (year) eighteen hundred
- 1800s – (decade) eighteen hundreds
- 1800th — one thousand eight hundredth
- 1812 — (number) one thousand eight hundred twelve, (year) eighteen twelve
- 19 — nineteen
- 19th — nineteenth
- 1900 (number) one thousand nine hundred, nineteen hundred, (year) nineteen hundred
- 1900s – (decade) nineteen hundreds
- 1900th -one thousand nine hundredth
- 1901 — (number) one thousand nine hundred and one, (year) nineteen oh one
- 1910 — (number) one thousand nine hundred and ten, (year) nineteen ten
- 1960s – (decade) nineteen sixties
- 1990 – (number) one thousand nine hundred and ninety, (year) nineteen ninety
- 1990s – (decade) nineteen nineties
- 1988 — (number) one thousand nine hundred and eighty-eight, nineteen eighty-eight
=2=
- 2 — two
- 2nd – second
- 2^2 — two squared
- 2^3 — two cubed
- 2.0 – two point oh
- 2/3 – two-thirds
- 2/4 – two-quarters
- 2/5 – two-fifth
- 20 — twenty
- 20s — twenties
- 20th — twentieth
- 200 – two hundred
- 200th – two hundredth
- 2000 – (year and number) two thousand
- 2000s – two thousands
- 2000th – two thousandth
- 20,000 – twenty thousand
- 200,000 – two hundred thousand
- 2001 – two thousand (and) one
- 201 – two hundred and one
- 2010 (number) two thousand (and) ten; (year) two thousand ten, twenty ten
- 2010s – twenty tens
- 2020 – two thousand twenty; (year) two thousand twenty, twenty twenty
- 21 – twenty-one
- 21st – twenty-first
- 22 – twenty-two
- 22nd – twenty-second
- 23 – twenty-three
- 23th – twenty-third
- 24 – twenty-four
- 24th – twenty-fourth
- 24/7 – twenty-four seven
- 25 – twenty-five
- 25th – twenty-fifth
- 26 – twenty-six
- 26th – twenty-sixth
- 27 – twenty-seven
- 27th – twenty-seventh
- 28 – twenty-eight
- 28th – twenty-eighth
- 29 – twenty-nine
- 29th – twenty-ninth
=3=
- 3 — three
- 3rd – third
- 3 s’s – three esis;
- 30 – thirty
- 30s — thirties
- 30th — thirtieth
- 300 – three hundred
- 3000 – three thousand
- 31 – thirty-one
- 31th – thirty-first
- 32 – thirty-two
- 33 – thirty-three
- 34 – thirty-four
- 35 – thirty-five
- 36 – thirty-six
- 37 – thirty-seven
- 38 – thirty-eight
- 39 – thirty-nine
=4=
- 4 — four
- 4s — fours
- 4th — fourth
- 40 – forty
- 400 – four hundred
- 4000 – four hundred
- 41 – forty-one
- 42 – forty-two
- 43 – forty-three
- 44 – forty-four
- 45 – forty-five
- 46 – forty-six
- 47 – forty-seven
- 48 – forty-eight
- 49 – forty-nine
=5=
- 5 — five
- 5s — fives
- 5th — fifth
- 50 – fifty
- 50% — fifty percent
- 50s — fifties
- 50th — fiftieth
- 500 – five hundred
- 5000 – five thousand
- 51 – fifty-one
- 52 – fifty-two
- 53 – fifty-three
- 54 – fifty-four
- 55 – fifty-five
- 56 – fifty-six
- 57 – fifty-seven
- 58 – fifty-eight
- 59 – fifty-nine
=6=
- 6 – six; half a dozen
- 6s – sixes
- 6th – sixth
- 6.0 – six point zero
- 60 — sixty
- 60s — sixties
- 60th — sixtieth
- 600 – six hundred
- 6000 – six thousand
- 61 – sixty-one
- 62 – sixty-two
- 63- sixty-three
- 64 – sixty- four
- 65 – sixty-five
- 66 – sixty-six
- 666 – six hundred and sixty-six, six sixty six
- 67 – sixty -seven
- 68 – sixty-eight
- 69 – sixty-nine
=7=
- 7 — seven
- 7s — sevens
- 7th- seventh
- 7-11 – seven eleven
- 70 — seventy
- 70s – seventies
- 70th – seventieth
- 700 – seven hundred
- 7,000 – seven thousand
- 70,000 – seventy thousand
- 700,000 – seven hundred thousand
- 7,000,000 – seven million
- 71 – seventy-one
- 72 – seventy-two
- 73 – seventy -three
- 74 – seventy-four
- 75 – seventy-five
- 76 – seventy-six
- 77 – sixty-seven
- 78 – sixty-eight
- 79 – seventy-nine
=8=
- 8 — eight
- 8s – eigths
- 8th — eighth
- 80 — eighty
- 80s — eighties
- 80th – eightieth
- 81 – eighty-one
- 82 – eighty-two
- 83 – eighty-three
- 84 – eighty-four
- 85 – eighty-five
- 86 – eighty-six
- 87 – eighty-seven
- 88 – eighty-eight
- 89 – eighty-nine
=9=
- 9 – nine
- 9th – ninth
- 90 — ninety
- 90s — nineties
- 90th – ninetieth
- 91 – ninety-one
- 92 – ninety-two
- 93 – ninety-three
- 94 – ninety-four
- 95 – ninety-five
- 96 – ninety -six
- 97 – ninety-seven
- 98 – ninety-eight
- 99 – ninety-nine
- 909 – (number) nine hundred and nine, (spelled, time) nine on nine
- 911- (number) nine hundred and eleven, (spelled, telephone) nine one one

Words to numbers

A – 1
Alone — 1
An -1
Baker’s dozen — 13
Couple – 2
Dozen – 12
Half – 0.5
Quarter – 0,25
Love (score) – 0
Midnight – 12 am
Noon – 12 pm
Nothing – 0
Number of the Beast, the — 666
Pair – 2
Single – 1
Solo -1
Teens – (a row of numbers) from 13 to 19
Ten tens – (decade) 1010s

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Источник

Numbers in English

There are two main types of numbers in English.

Cardinal Numbers: one, two, three, four…..

Ordinal numbers: First, Second, Third, Fourth….

Cardinal numbers

We use Cardinal numbers in the following situations:

To count things

There are 6 cars on the road.

Your age

I am 32 years old.

Your telephone number

My number is 0876776543.

Your address

I live at 52 Kerava street.

We don’t use Cardinal numbers for dates.

List of Cardinal Numbers

1 – one

2 – two

3 – three

4 – four

5 – five

6 – six

7 – seven

8 – eight

9 – nine

10 – ten

11 – eleven

12 – twelve

13 – thirteen

14 – fourteen

15 – fifteen

16 – sixteen

17 – seventeen

18 – eighteen

19 – nineteen

20 – twenty

21 – twenty-one

22 – twenty-two

23 – twenty-three

24 – twenty-four

25 – twenty-five

26 – twenty-six

27 – twenty-seven

28 – twenty-eight

29 – twenty-nine

30 – thirty

31 – thirty-one

32 – thirty-two

33 – thirty-three

34 – thirty-four

35 – thirty-five

36 – thirty-six

37 – thirty-seven

38 – thirty-eight

39 – thirty-nine

40 – forty

41 – forty-one

42 – forty-two

43 – forty-three

44 – forty-four

45 – forty-five

46 – forty-six

47 – forty-seven

48 – forty-eight

49 – forty-nine

50 – fifty

51 – fifty-one

52 – fifty-two

53 – fifty-three

54 – fifty-four

55 – fifty-five

56 – fifty-six

57 – fifty-seven

58 – fifty-eight

59 – fifty-nine

60 – sixty

61 – sixty-one

62 – sixty-two

63 – sixty-three

64 – sixty-four

65 – sixty-five

66 – sixty-six

67 – sixty-seven

68 – sixty-eight

69 – sixty-nine

70 – seventy

71 – seventy-one

72 – seventy-two

73 – seventy-three

74 – seventy-four

75 – seventy-five

76 – seventy-six

77 – seventy-seven

78 – seventy-eight

79 – seventy-nine

80 – eighty

81 – eighty-one

82 – eighty-two

83 – eighty-three

84 – eighty-four

85 – eighty-five

86 – eighty-six

87 – eighty-seven

88 – eighty-eight

89 – eighty-nine

90 – ninety

91 – ninety-one

92 – ninety-two

93 – ninety-three

94 – ninety-four

95 – ninety-five

96 – ninety-six

97 – ninety-seven

98 – ninety-eight

99 – ninety-nine

100 – one hundred

Ordinal Numbers

We use ordinal numbers in the following situations:

For dates

It is the first of March.

Building Floors

I live on the second floor.

For rankings

I came third in the race.

For Birthdays/Years of activity

It is my thirtieth birthday on Sunday.

For centuries

I was born in the twentieth century.

List of Ordinal Numbers

1st – first

2nd – second

3rd – third

4th – fourth

5th – fifth

6th – sixth

7th – seventh

8th – eighth

9th – ninth

10th – tenth

11th – eleventh

12th – twelfth

13th – thirteenth

14th – fourteenth

15th – fifteenth

16th – sixteenth

17th – seventeenth

18th – eighteenth

19th – nineteenth

20th – twentieth

21st – twenty-first

22nd – twenty-second

23rd – twenty-third

24th – twenty-fourth

25th – twenty-fifth

26th – twenty-sixth

27th – twenty-seventh

28th – twenty-eighth

29th – twenty-ninth

30th – thirtieth

31st – thirty-first

32nd – thirty-second

33rd – thirty-third

34th – thirty-fourth

35th – thirty-fifth

36th – thirty-sixth

37th – thirty-seventh

38th – thirty-eighth

39th –thirty-ninth

40th – fortieth

41st – forty-first

42nd – forty-second

43rd – forty-third

44th – forty-fourth

45th –forty-fifth

46th – forty-sixth

47th – forty-seventh

48th – forty-eighth

49th – forty-ninth

50th – fiftieth

Numbers in English above 100(1-1000)

When you need to write numbers above one hundred you need to use “and”.

427 Four hundred and twenty-seven

100 one hundred

200 two hundred

300 three hundred

400 four hundred

500 five hundred

600 six hundred

700 seven hundred

800 eight hundred

900 nine hundred

1000 one thousand

Источник

English number words include numerals and various words derived from them.

Cardinal Numbers[]

Cardinal numbers refer to the size of a group. In English, these words are numerals. The numbers from 0 through 9 have the same names as in decimal but numbers greater than 9, there is no agreed upon name for units.

0 — zero (nought) (sometimes pronouced as «oh» in speech)
1 — one
2 — two
3 — three
4 — four
5 — five
6 — six
7 — seven
8 — eight
9 — nine
X — ten, dek
E — eleven, el, elv, lev, ven
10 — twelve, dozen, doh, zen, unqua
20 — twenty, two-doh
30 — thirty, three-doh
X0 — dekty, dek-doh
E0 — elty, el-doh
100 — hundred, gross
1000 — thousand, great-gross, mo

E has numerous names because eleven’s (decimal name for E) etymology originates from a Germanic compound ainlif meaning «one left» thus, is a decimal name rather than a dozenal name. The word lev for E is not advised as lev is a root in SDN and would cause confusion e.g. levqua = 10;^E but lev levqua could mean either 10;^EE or E 10;^E

For larger numbers, there are approximately X different systems. The following table show the following names for larger numbers:

	Type	Traditional	Gross-Zagier	Vintage DSA	Grand	Alternative Grand	TGM	SDN	UUS — Myriads	UUS — Prefix	Mirioss
	Power Grouping	1	3	3	3	3	1	1	Powers of 2	Mixture	4
Power of 10;
1		twelve	dozen	doh	doh	doh	zen	unqua	dozen	dozen
2		gross	gross	gro	grosan	grosan	duna	biqua	gross	hecty
3		great gross / grand gross / maß (germanic)	zagier	mo	unand / grand	monand	trina	triqua		kily
4		great great gross					quedra	quadqua	myriad	super	mirioss
5							quena	pentqua
6			bi-zagier	bi-mo	binand	dyand	hesa	hexqua
7							seva	septqua
8							aka	octqua	myllion	cosmic	birioss
9			tri-zagier	tri-mo	triand	triand	neena	ennqua
X							dexa	dekqua
E							lefa	levqua
10			quad-zagier	quad-mo	quadrand	tetrand	zennila	unnilqua			tirioss
11							zenzena	ununqua
12							zenduna	unbiqua
13			pent-zagier	pent-mo	pentand	penta	zentrina	untriqua
14							zenquedra	unquadqua	byllion	by-cosmic	quirioss
15							zenquena	unpentqua
16			hex-zagier	hex-mo	hexand	hexand	zenhesa	unhexqua
17							zenseva	unseptqua
18							zenaka	unoctqua			pentirioss
19			sept-zagier	sept-mo	septand	septand	zenneena	unennqua
1X							zendexa	undekqua
1E							zenlefa	unlevqua
20			oct-zagier	oct-mo	octand	octand	dunduna	binilqua			hexirioss
21							dunzena	biunqua
22							dunduna	bibiqua
23			non-zagier	enna-mo	ennand	nonand	duntrina	bitriqua
24							dunquedra	biquadqua			septirioss
25							dunquena	bipentqua
26			dek-zagier	dek-mo	dekand	dekand	dunhesa	bihexqua
27							dunseva	biseptqua
28							dunaka	bioctqua	tryllion	try-cosmic	okkirioss
29			lev-zagier	lev-mo	levand	venand	dunneena	biennqua
2X							dundexa	bidekqua
2E							dunlefa	bilevqua
30			un-nil-zagier	un-nil-mo	unniland	monniland	trinnila	trinilqua			nokkirioss
31							trinzena	triunqua
32							trinduna	tribiqua
33			un-un-zagier	un-un-mo	ununand	mondyand	trintrina	tritriqua
34							trinquedra	triquadqua			dekirioss
35							trinquena	tripentqua
36			un-bi-zagier	un-bi-mo	unbiand	mondyand	trinhesa	trihexqua
37							trinseva	triseptqua
38							trinaka	trioctqua			elkirioss
39			un-tri-zagier	un-tri-mo	untriand	montriand	trinneena	triennqua
3X							trindexa	tridekqua
3E							trinlefa	trilevqua			minikirioss
40			un-quad-zagier	un-quad-mo	unquadrand	montetrand	quedranila	quadnilqua

The following text will use the Grand system, Ten for X, and Elv for E

In English, all numbers are perfectly regular, except for the word doh on its own can have no one in front of it (10 = doh / one-doh).

If a number is in the range 11; to EE;, and the second digit is not zero, you typically write the number in words separated by a hyphen.

20	two-doh
21	two-doh-one
32	three-doh-two
79	seven-doh-nine
EE	elv-doh-elv

The grosans are written in the following fashion:

100	one grosan
200	two grosan
…	…
E00	elv grosan

So too are the unands, with the number of unands followed by the word «unand»

1000	one unand
2000	two unand
…	…
E000	elv unand
10 000	doh unand
11 000	doh-one unand
87 000	eight-doh-seven unand

For high powers of doh, the same conversion is used for biand, triand, quadrand, etc.

And example number such as 63E 014 791 62X; can be written in english as the following:
six grosan three-doh-elv doh-four biand seven-grosan nine-doh-one unand six-grosan two-doh-ten

Dozenal

Short scale[]

Sets of 3 zeros

(n) (n-illion) (number of zeros: 3n+3) (value: 10³ⁿ⁺³)

1 million 6 (1,000,000)

2 billion 9 (1,000,000,000)

3 trillion 10 (1,000,000,000,000)

4 quadrillion 13 (1,000,000,000,000,000)

5 quintillion 16 (1,000,000,000,000,000,000)

6 sextillion 19 (1,000,000,000,000,000,000,000)

7 septillion 20 (1,000,000,000,000,000,000,000,000)

8 octillion 23 (1,000,000,000,000,000,000,000,000,000)

9 nonillion 26 (1,000,000,000,000,000,000,000,000,000,000)

X dekrillion 29 (1,000,000,000,000,000,000,000,000,000,000,000)

E elpillion 30 (1,000,000,000,000,000,000,000,000,000,000,000,000)

10 dozillion 33 (1,000,000,000,000,000,000,000,000,000,000,000,000,000)

11 undozillion 36 (etc…)

12 duodozillion 39

13 tredozillion 40

14 quattuordozillion 43

15 quindozillion 46

16 sexdozillion 49

17 septendozillion 50

18 octodozillion 53

19 novemdozillion 56

1X dekradozillion 59

1E elpindozillion 60

20 vigintillion 63

21 unvigintillion 66

22 duovigintillion 69

23 trevigintillion 70

24 quattuorvigintillion 73

25 quinvigintillion 76

26 sexvigintillion 79

27 septenvigintillion 80

28 octovigintillion 83

29 novemvigintillion 86

2X dekravigintillion 89

2E elpinvigintillion 90

30 trigintillion 93

31 untrigintillion 96

32 duotrigintillion 99

33 tretrigintillion X0

34 quattuortrigintillion X3

35 quintrigintillion X6

36 sextrigintillion X9

37 septentrigintillion E0

38 octotrigintillion E3

39 novemtrigintillion E6

3X dekratrigintillion E9

3E elpintrigintillion 100

40 quadragintillion 103

41 unquadragintillion 106

42 duoquadragintillion 109

43 trequadragintillion 110

44 quattuorquadragintillion 113

45 quinquadragintillion 116

46 sexquadragintillion 119

47 septenquadragintillion 120

48 octoquadragintillion 123

49 novemquadragintillion 126

4X dekraquadragintillion 129

4E elpinquadragintillion 130

50 quinquagintillion 133

51 unquinquagintillion 136

52 duoquinquagintillion 139

53 trequinquagintillion 140

54 quattuorquinquagintillion 143

55 quinquinquagintillion 146

56 sexquinquagintillion 149

57 septenquinquagintillion 150

58 octoquinquagintillion 153

59 novemquinquagintillion 156

5X dekraquinquagintillion 159

5E elpinquinquagintillion 160

60 sexagintillion 163

61 unsexagintillion 166

62 duosexagintillion 169

63 tresexagintillion 170

64 quattuorsexagintillion 173

65 quinsexagintillion 176

66 sexsexagintillion 179

67 septensexagintillion 180

68 octosexagintillion 183

69 novemsexagintillion 186

6X dekrasexagintillion 189

6E elpinsexagintillion 190

70 septuagintillion 193

71 unseptuagintillion 196

72 duoseptuagintillion 199

73 treseptuagintillion 1X0

74 quattuorseptuagintillion 1X3

75 quinseptuagintillion 1X6

76 sexseptuagintillion 1X9

77 septenseptuagintillion 1E0

78 octoseptuagintillion 1E3

79 novemseptuagintillion 1E6

7X dekraseptuagintillion 1E9

7E elpinseptuagintillion 200

80 octogintillion 203

81 unoctogintillion 206

82 duooctogintillion 209

83 treoctogintillion 210

84 quattuoroctogintillion 213

85 quinoctogintillion 216

86 sexoctogintillion 219

87 septenoctogintillion 220

88 octooctogintillion 223

89 novemoctogintillion 226

8X dekraoctogintillion 229

8E elpinoctogintillion 230

90 nonagintillion 233

91 unnonagintillion 236

92 duononagintillion 239

93 trenonagintillion 240

94 quattuornonagintillion 243

95 quinnonagintillion 246

96 sexnonagintillion 249

97 septennonagintillion 250

98 octononagintillion 253

99 novemnonagintillion 256

9X dekranonagintillion 259

9E elpinnonagintillion 260

X0 dekragintillion 263

X1 undekragintillion 266

X2 duodekragintillion 269

X3 tredekragintillion 270

X4 quattuordekragintillion 273

X5 quindekragintillion 276

X6 sexdekragintillion 279

X7 septendekragintillion 280

X8 octodekragintillion 283

X9 novemdekragintillion 286

XX dekradekragintillion 289

XE elpindekragintillion 290

E0 elpagintillion 293

E1 unelpagintillion 296

E2 duoelpagintillion 299

E3 treelpagintillion 2X0

E4 quattuorelpagintillion 2X3

E5 quinelpagintillion 2X6

E6 sexelpagintillion 2X9

E7 septenelpagintillion 2E0

E8 octoelpagintillion 2E3

E9 novemelpagintillion 2E6

EX dekraelpagintillion 2E9

EE elpinelpagintillion 300

100 centillion 303

(there is no consistent and widely accepted way to extend cardinals beyond centillion)

Centillion (10³⁰³) is second largest named number after googolplex (10^10¹⁰⁰) and the largest number with a conventional name.

For long scale, «n» should be corresponding to 6n (10⁶ⁿ) instead of 3n+3 (10³ⁿ⁺³), and 6n+3 can be either «thousand n-illion» or «n-illiard». Besides, for super-long scale, «n» should be corresponding to 10n (10¹⁰ⁿ) instead of 3n+3 (10³ⁿ⁺³), and 10n+3 is «thousand n-illion», 10n+6 is «n-illiard», 10n+9 is «thousand n-illiard».

We can name all numbers <= 306 digits in short scale, all numbers <= 606 digits in long scale, and all numbers <= 1010 digits in super-long scale.

The numbers < 10⁹ (i.e. <= 9 digits) have the same names in all of these three scales.

The small units are «onety» (instead of «ten») for 10¹ and «hundred» for 10², besides, for super-long scale, 10⁶ is still «million», but 10¹⁰ is a new word «unillion», and 10¹⁶ is «unilliard».

0 zero

1 one

2 two

3 three

4 four

5 five

6 six

7 seven

8 eight

9 nine

X dek

E el

10 onety

20 twenty

30 thirty

40 forty

50 fifty

60 sixty

70 seventy

80 eighty

90 ninety

X0 dekty

E0 elty

100 one hundred

1000 one thousand

Numbers 0 to 100[]

0: zero (zeroth) (0th)

1: one (first) (1st)

2: two (second) (2nd)

3: three (third) (3rd)

4: four (fourth) (4th)

5: five (fifth) (5th)

6: six (sixth) (6th)

7: seven (seventh) (7th)

8: eight (eighth) (8th)

9: nine (ninth) (9th)

X: dek (dekth) (Xth)

E: el (elth) (Eth)

10: onety (onetieth) (10th) ten? tenth? doz? dozth? dozen? dozenth?

11: onety-one (onety-first) (11st) oneteen? oneteenth? 11th? onedoz? onedozth?

12: onety-two (onety-second) (12nd) twenteen? twenteenth? 12th? twendoz? twendozth?

13: onety-three (onety-third) (13rd) thirteen? thirteenth? 13th? thirdoz? thirdozth?

14: onety-four (onety-fourth) (14th) fourteen? fourteenth? fourdoz? fourdozth?

15: onety-five (onety-fifth) (15th) fifteen? fifteenth? fifdoz? fifdozth?

16: onety-six (onety-sixth) (16th) sixteen? sixteenth? sixdoz? sixdozth?

17: onety-seven (onety-seventh) (17th) seventeen? seventeenth? sevendoz? sevendozth?

18: onety-eight (onety-eighth) (18th) eighteen? eighteenth? eightdoz? eightdozth?

19: onety-nine (onety-ninth) (19th) nineteen? nineteenth? ninedoz? ninedozth?

1X: onety-dek (onety-dekth) (1Xth) dekteen? dekteenth? dekdoz? dekdozth?

1E: onety-el (onety-elth) (1Eth) elteen? elteenth? eldoz? eldozth?

20: twenty (twentieth) (20th)

21: twenty-one (twenty-first) (21st)

22: twenty-two (twenty-second) (22nd)

23: twenty-three (twenty-third) (23rd)

24: twenty-four (twenty-fourth) (24th)

25: twenty-five (twenty-fifth) (25th)

26: twenty-six (twenty-sixth) (26th)

27: twenty-seven (twenty-seventh) (27th)

28: twenty-eight (twenty-eighth) (28th)

29: twenty-nine (twenty-ninth) (29th)

2X: twenty-dek (twenty-dekth) (2Xth)

2E: twenty-el (twenty-elth) (2Eth)

30: thirty (thirtieth) (30th)

31: thirty-one (thirty-first) (31st)

32: thirty-two (thirty-second) (32nd)

33: thirty-three (thirty-third) (33rd)

34: thirty-four (thirty-fourth) (34th)

35: thirty-five

36: thirty-six

37: thirty-seven

38: thirty-eight

39: thirty-nine

3X: thirty-dek

3E: thirty-el

40: forty

41: forty-one

42: forty-two

43: forty-three

44: forty-four

45: forty-five

46: forty-six

47: forty-seven

48: forty-eight

49: forty-nine

4X: forty-dek

4E: forty-el

50: fifty

51: fifty-one

52: fifty-two

53: fifty-three

54: fifty-four

55: fifty-five

56: fifty-six

57: fifty-seven

58: fifty-eight

59: fifty-nine

5X: fifty-dek

5E: fifty-el

60: sixty

61: sixty-one

62: sixty-two

63: sixty-three

64: sixty-four

65: sixty-five

66: sixty-six

67: sixty-seven

68: sixty-eight

69: sixty-nine

6X: sixty-dek

6E: sixty-el

70: seventy

71: seventy-one

72: seventy-two

73: seventy-three

74: seventy-four

75: seventy-five

76: seventy-six

77: seventy-seven

78: seventy-eight

79: seventy-nine

7X: seventy-dek

7E: seventy-el

80: eighty

81: eighty-one

82: eighty-two

83: eighty-three

84: eighty-four

85: eighty-five

86: eighty-six

87: eighty-seven

88: eighty-eight

89: eighty-nine

8X: eighty-dek

8E: eighty-el

90: ninety

91: ninety-one

92: ninety-two

93: ninety-three

94: ninety-four

95: ninety-five

96: ninety-six

97: ninety-seven

98: ninety-eight

99: ninety-nine

9X: ninety-dek

9E: ninety-el

X0: dekty

X1: dekty-one

X2: dekty-two

X3: dekty-three

X4: dekty-four

X5: dekty-five

X6: dekty-six

X7: dekty-seven

X8: dekty-eight

X9: dekty-nine

XX: dekty-dek

XE: dekty-el

E0: elty

E1: elty-one

E2: elty-two

E3: elty-three

E4: elty-four

E5: elty-five

E6: elty-six

E7: elty-seven

E8: elty-eight

E9: elty-nine

EX: elty-dek

EE: elty-el

100: one hundred (one hundredth) (100th)

A system of dozenal (duodecimal) numerals[]

Use «.» instead of «;» for the dozenal point

This numeral system can be used of the nonnegative integers < 10¹⁰¹⁰_. (i.e. <= 1010 digits).

This is the super-long scale.

(In this list, all numbers are written in dozenal)

number	name
0	zero（〇/零）
1	one（一/壹）
2	two（二/貳）
3	three（三/叄）
4	four（四/䦉）
5	five（五/伍）
6	six（六/陸）
7	seven（七/柒）
8	eight（八/捌）
9	nine（九/玖）
X	dek（丁/躂）（dā）
E	el（乂/薆）（ài）
10	onety（十/拾）
11	onety-one
12	onety-two
13	onety-three
14	onety-four
15	onety-five
16	onety-six
17	onety-seven
18	onety-eight
19	onety-nine
1X	onety-dek
1E	onety-el
20	twenty
21	twenty-one
22	twenty-two
23	twenty-three
24	twenty-four
25	twenty-five
26	twenty-six
27	twenty-seven
28	twenty-eight
29	twenty-nine
2X	twenty-dek
2E	twenty-el
30	thirty
31	thirty-one
32	thirty-two
33	thirty-three
40	forty
50	fifty
60	sixty
70	seventy
80	eighty
90	ninety
X0	dekty
E0	elty
100	one hundred（一百/壹佰）
101	one hundred one
102	one hundred two
103	one hundred three
110	one hundred onety
111	one hundred onety-one
200	two hundred
300	three hundred
400	four hundred
500	five hundred
600	six hundred
700	seven hundred
800	eight hundred
900	nine hundred
X00	dek hundred
E00	el hundred
1000	one thousand（一千/壹仟）
1001	one thousand one
1010	one thousand onety
1011	one thousand onety-one
1100	one thousand one hundred
1101	one thousand one hundred one
1110	one thousand one hundred onety
1111	one thousand one hundred onety-one
2000	two thousand
3000	three thousand
10000	onety thousand（一万/壹萬）
100000	one hundred thousand
10⁶	one million
10⁷	onety million
10⁸	one hundred million
10⁹	one thousand million
10^X	onety thousand million
10^E	one hundred thousand million
10¹⁰	one unillion
10¹¹	onety unillion
10¹²	one hundred unillion
10¹³	one thousand unillion
10¹⁴	onety thousand unillion
10¹⁵	one hundred thousand unillion
10¹⁶	one unilliard
10¹⁷	onety unilliard
10¹⁸	one hundred unilliard
10¹⁹	one thousand unilliard
10^1X	onety thousand unilliard
10^1E	one hundred thousand unilliard
10²⁰	one billion
10²¹	onety billion
10²²	one hundred billion
10²³	one thousand billion
10²⁴	onety thousand billion
10²⁵	one hundred thousand billion
10²⁶	one billiard
10²⁷	onety billiard
10²⁸	one hundred billiard
10²⁹	one thousand billiard
10^2X	onety thousand billiard
10^2E	one hundred thousand billiard
10³⁰	one trillion
10³⁶	one trilliard
10⁴⁰	one quadrillion
10⁴⁶	one quadrilliard
10⁵⁰	one quintillion
10⁵⁶	one quintilliard
10⁶⁰	one sextillion
10⁶⁶	one sextilliard
10⁷⁰	one septillion
10⁸⁰	one octillion
10⁹⁰	one nonillion
10^X0	one dekrillion
10^E0	one elpillion
10¹⁰⁰	one dozillion (one googol)
10¹¹⁰	one undozillion
10¹²⁰	one duodozillion
10¹³⁰	one tredozillion
10¹⁴⁰	one quattuordozillion
10¹⁵⁰	one quindozillion
10¹⁶⁰	one sexdozillion
10¹⁷⁰	one septendozillion
10¹⁸⁰	one octodozillion
10¹⁹⁰	one novemdozillion
10^1X0	one dekradozillion
10^1E0	one elpindozillion
10²⁰⁰	one vigintillion
10²¹⁰	one unvigintillion
10²²⁰	one duovigintillion
10²³⁰	one trevigintillion
10³⁰⁰	one trigintillion
10⁴⁰⁰	one quadragintillion
10⁵⁰⁰	one quinquagintillion
10⁶⁰⁰	one sexagintillion
10⁷⁰⁰	one septuagintillion
10⁸⁰⁰	one octogintillion
10⁹⁰⁰	one nonagintillion
10^X00	one dekragintillion
10^E00	one elpagintillion
10¹⁰⁰⁰	one centillion

SI prefixes of powers of 10:

This is the new SI prefix.

(In this list, all numbers are written in dozenal)

number	prefix name	prefix symbol	number	prefix name	prefix symbol
10¹	doza	D	10⁻¹	dozi	d
10²	hecto	H	10⁻²	centi	c
10³	kilo	K	10⁻³	milli	m
10⁶	mega	M	10⁻⁶	micro	µ
10⁹	giga	G	10⁻⁹	nano	n
10¹⁰	sona	S	10⁻¹⁰	leco	l
10²⁰	jota	J	10⁻²⁰	bipo	b
10³⁰	rina	R	10⁻³⁰	rito	r
10⁴⁰	tera	T	10⁻⁴⁰	pico	p
10⁵⁰	peta	P	10⁻⁵⁰	femto	f
10⁶⁰	exa	E	10⁻⁶⁰	atto	a
10⁷⁰	zepta	Z	10⁻⁷⁰	zepto	z
10⁸⁰	yocta	Y	10⁻⁸⁰	yocto	y
10⁹⁰	xona	X	10⁻⁹⁰	xono	x
10^X0	wekra	W	10^−X0	wekro	w
10^E0	velpa	V	10^−E0	velpo	v
10¹⁰⁰	uzena	U	10⁻¹⁰⁰	uzeno	u

Example[]

The number 2¹⁰⁰ = 16,25X,715,4X6,93E,005,208,8E9,747,1EE,X06,409,69E,854 that has 35 digits.

In short scale, this number is

onety-six dozillion two hundred fifty-dek elpillion seven hundred onety-five dekrillion four hundred dekty-six nonillion nine hundred thirty-el octillion five septillion two hundred eight sextillion eight hundred elty-nine quintillion seven hundred forty-seven quadrillion one hundred elty-el trillion dek hundred six billion four hundred nine million six hundred ninety-el thousand eight hundred fifty-four

In long scale, this number is

onety-six thousand two hundred fifty-dek sextillion seven hundred onety-five thousand four hundred dekty-six quintillion nine hundred thirty-el thousand five quadrillion two hundred eight thousand eight hundred elty-nine trillion seven hundred forty-seven thousand one hundred elty-el billion dek hundred six thousand four hundred nine million six hundred ninety-el thousand eight hundred fifty-four

onety-six sextilliard two hundred fifty-dek sextillion seven hundred onety-five quintillion’s four hundred dekty-six quintillion nine hundred thirty-el quadrilliard five quadrillion two hundred eight trilliard eight hundred elty-nine trillion seven hundred forty-seven billiard one hundred elty-el billion dek hundred six milliard four hundred nine million six hundred ninety-el thousand eight hundred fifty-four

In super-long scale, this number is

onety-six thousand two hundred fifty-dek trillion seven hundred onety-five thousand four hundred dekty-six billiard nine hundred thirty-el thousand five billion two hundred eight thousand eight hundred elty-nine unilliard seven hundred forty-seven thousand one hundred elty-el unillion dek hundred six thousand four hundred nine million six hundred ninety-el thousand eight hundred fifty-four

In fact, the number 10⁴³ is simply read out as «onety to the forty-third». This is easier to say and less ambiguous than «quattuordozillion», which means something different in the long scale and the short scale (in long scale, it means 10⁸⁰).

The googol family[]

googol = 10^100

bigoogol = 10^200

trigoogol = 10^300

quadrigoogol = 10^400

quintigoogol = 10^500

sextigoogol = 10^600

septigoogol = 10^700

octigoogol = 10^800

nonigoogol = 10^900

dekrigoogol = 10^X00

elpigoogol = 10^E00

dozigoogol (great googol) = 10^1000

centigoogol = 10^10000

googolplex = 10^(10^100)

googolplexplex (googolduplex, googolplexian) = 10^(10^(10^100))

Also googoltriplex (=10^(10^(10^(10^100)))), googolquadriplex, googolquintiplex, googolsextiplex, googolseptiplex, googoloctiplex, googolnoniplex, googoldekriplex, googolelpiplex, googoldoziplex, …, googolcentiplex

Note: n-plex is 10ⁿ, n-minex is 10^-n.

100 = gross

1000 = great gross

10^100 = googol (grossplex)

10^1000 = great googol (great grossplex)

SI prefixes[]

Prefix	Base 1000	Base 10	Dozenal	English word
Name	Symbol	Short scale	Long scale
yotta	Y	1000⁸	10²⁰	1 000000 000000 000000 000000	septillion	quadrillion
zetta	Z	1000⁷	10¹⁹	1000 000000 000000 000000	sextillion	trilliard
exa	E	1000⁶	10¹⁶	1 000000 000000 000000	quintillion	trillion
peta	P	1000⁵	10¹³	1000 000000 000000	quadrillion	billiard
tera	T	1000⁴	10¹⁰	1 000000 000000	trillion	billion
giga	G	1000³	10⁹	1000 000000	billion	milliard
mega	M	1000²	10⁶	1 000000	million
kilo	k	1000¹	10³	1000	thousand
hecto	h	1000^0.8	10²	100	hundred
deca	da / D	1000^0.4	10¹	10	onety
	1000⁰	10⁰	1	one
deci	d	1000^−0.4	10⁻¹	0.1	onetieth
centi	c	1000^−0.8	10⁻²	0.01	hundredth
milli	m	1000⁻¹	10⁻³	0.001	thousandth
micro	μ	1000⁻²	10⁻⁶	0.000001	millionth
nano	n	1000⁻³	10⁻⁹	0.000000 001	billionth	milliardth
pico	p	1000⁻⁴	10⁻¹⁰	0.000000 000001	trillionth	billionth
femto	f	1000⁻⁵	10⁻¹³	0.000000 000000 001	quadrillionth	billiardth
atto	a	1000⁻⁶	10⁻¹⁶	0.000000 000000 000001	quintillionth	trillionth
zepto	z	1000⁻⁷	10⁻¹⁹	0.000000 000000 000000 001	sextillionth	trilliardth
yocto	y	1000⁻⁸	10⁻²⁰	0.000000 000000 000000 000001	septillionth	quadrillionth

List of number names[]

1 = One

10 = Onety

100 = One hundred

1000 = One thousand

1000000 = One million

1000000000 = One billion

1000000000000 = One trillion

1000000000000000 = One quadrillion

1000000000000000000 = One quintillion

1000000000000000000000 = One sextillion

1000000000000000000000000 = One septillion

1000000000000000000000000000 = One octillion

1000000000000000000000000000000 = One nonillion

1000000000000000000000000000000000 = One dekrillion

1000000000000000000000000000000000000 = One elpillion

1000000000000000000000000000000000000000 = One dozillion

1000000000000000000000000000000000000000000 = One undozillion

1000000000000000000000000000000000000000000000 = One duodozillion

1000000000000000000000000000000000000000000000000 = One tredozillion

1000000000000000000000000000000000000000000000000000 = One quattuordozillion

1000000000000000000000000000000000000000000000000000000 = One quindozillion

1000000000000000000000000000000000000000000000000000000000 = One sexdozillion

1000000000000000000000000000000000000000000000000000000000000 = One septendozillion

1000000000000000000000000000000000000000000000000000000000000000 = One octodozillion

1000000000000000000000000000000000000000000000000000000000000000000 = One novemdozillion

1000000000000000000000000000000000000000000000000000000000000000000000 = One dekradozillion

1000000000000000000000000000000000000000000000000000000000000000000000000 = One elpindozillion

1000000000000000000000000000000000000000000000000000000000000000000000000000 = One vigintillion

1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 = One googol (the number 1 followed by 100 zeros)

1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 = One centillion (the number 1 followed by 303 zeros)

One googolplex = The number 1 followed by a googol zeros (there literally isn’t enough room in the universe to write this number).

Table of dozenal numerals[]

The value of “n-illion” is 10³ⁿ⁺³ in short scale, 10⁶ⁿ in long scale, and 10¹⁰ⁿ in super-long scale.

There is no consistent and widely accepted way to extend cardinals beyond centillion (centilliard).

(In this list, all numbers are written in dozenal)

Value	English (short scale, original) every new term is 10³ times as large as the previous term (n-illion is 10³ⁿ⁺³)	English (long scale, original) every new term is 10⁶ times as large as the previous term (n-illion is 10⁶ⁿ)	English (super-long scale, new) every new term is 10¹⁰ times as large as the previous term (n-illion is 10¹⁰ⁿ)	Original SI prefix	Original SI symbol	New SI prefix	New SI symbol	中文（萬進）	中文（兆進）（不使用佛經詞）	中文（SI單位名稱）	中文（SI單位全名）
10¹⁰⁰⁰	~~(3EE-illion)~~	~~(200-illion)~~	centillion

10⁶⁰³	~~(200-illion)~~	thousand centillion (centilliard)
10⁶⁰²
10⁶⁰¹
10⁶⁰⁰	~~(1EE-illion)~~	centillion	sexagintillion

10³⁰³	centillion	thousand sexagintillion (sexagintilliard)
10³⁰²
10³⁰¹
10³⁰⁰	elpinelpagintillion	sexagintillion	trigintillion

10²⁰³	octogintillion	thousand quadragintillion (quadragintilliard)
10²⁰²
10²⁰¹
10²⁰⁰	elpinseptuagintillion	quadragintillion	vigintillion					大數大數大數大數	極極

10¹⁹³	septuagintillion	thousand sextrigintillion (sextrigintilliard)
10¹⁹²
10¹⁹¹
10¹⁹⁰	elpinsexagintillion	sextrigintillion	novemdozillion					澗大數大數大數	補極

10¹⁶³	sexagintillion	thousand trigintillion (trigintilliard)
10¹⁶²
10¹⁶¹
10¹⁶⁰	elpinquinquagintillion	trigintillion	sexdozillion					大數大數大數	溝極

10¹³³	quinquagintillion	thousand sexvigintillion (sexvigintilliard)
10¹³²
10¹³¹
10¹³⁰	elpinquadragintillion	sexvigintillion	tredozillion					澗大數大數	垓極

10¹⁰³	quadragintillion	thousand vigintillion (vigintilliard)
10¹⁰²
10¹⁰¹
10¹⁰⁰	elpintrigintillion (googol)	vigintillion (googol)	dozillion (googol)			Uzena	U	大數大數（古高爾）	極（古高爾）

10^E0	septentrigintillion	dekradozillion	elpillion			Velpa	V	那由他大數	載

10^X0	tretrigintillion	octodozillion	dekrillion			Wekra	W	極大數	選

10⁹³	trigintillion	thousand sexdozillion (sexdozilliard)
10⁹²
10⁹¹
10⁹⁰	elpinvigintillion	sexdozillion	nonillion			Xona	X	澗大數	補

10⁸⁰	septenvigintillion	quattuordozillion	octillion			Yocta	Y	秭大數	正

10^7E
10^7X
10⁷⁹	sexvigintillion	thousand tredozillion (tredozilliard)
10⁷⁸								垓大數
10⁷⁷
10⁷⁶	quinvigintillion	tredozillion	septilliard
10⁷⁵
10⁷⁴								京大數
10⁷³	quattuorvigintillion	thousand duodozillion (duodozilliard)
10⁷²
10⁷¹
10⁷⁰	trevigintillion	duodozillion	septillion			Zepta	Z	兆大數	澗

10^6E
10^6X
10⁶⁹	duovigintillion	thousand undozillion (undozilliard)
10⁶⁸								億大數
10⁶⁷
10⁶⁶	unvigintillion	undozillion	sextilliard
10⁶⁵
10⁶⁴								萬大數
10⁶³	vigintillion	thousand dozillion (dozilliard)
10⁶²
10⁶¹
10⁶⁰	elpindozillion	dozillion	sextillion			Exa	E	大數	溝

10^5E
10^5X
10⁵⁹	dekradozillion	thousand elpillion (elpilliard)
10⁵⁸								無量
10⁵⁷
10⁵⁶	novemdozillion	elpillion	quintilliard
10⁵⁵
10⁵⁴								不可思議
10⁵³	octodozillion	thousand dekrillion (dekrilliard)
10⁵²
10⁵¹
10⁵⁰	septendozillion	dekrillion	quintillion			Peta	P	那由他	穰

10^4E
10^4X
10⁴⁹	sexdozillion	thousand nonillion (nonilliard)
10⁴⁸								阿僧歧
10⁴⁷
10⁴⁶	quindozillion	nonillion	quadrilliard
10⁴⁵
10⁴⁴								恆河沙
10⁴³	quattuordozillion	thousand octillion (octilliard)
10⁴²
10⁴¹
10⁴⁰	tredozillion	octillion	quadrillion			Tera	T	極	秭

10^3E
10^3X
10³⁹	duodozillion	thousand septillion (septilliard)
10³⁸								載
10³⁷
10³⁶	undozillion	septillion	trilliard
10³⁵
10³⁴								正
10³³	dozillion	thousand sextillion (sextilliard)
10³²
10³¹
10³⁰	elpillion	sextillion	trillion	Uzena	U	Rina	R	澗	垓

10^2E	hundred dekrillion	hundred thousand quintillion (hundred quintilliard)	hundred thousand billiard					千溝	千億京
10^2X	onety dekrillion	onety thousand quintillion (onety quintilliard)	onety thousand billiard					百溝	百億京
10²⁹	dekrillion	thousand quintillion (quintilliard)	thousand billiard	Velpa	V			十溝	十億京
10²⁸	hundred nonillion	hundred quintillion	hundred billiard					溝	億京
10²⁷	onety nonillion	onety quintillion	onety billiard					千穰	千萬京
10²⁶	nonillion	quintillion	billiard	Wecra	W			百穰	百萬京
10²⁵	hundred octillion	hundred thousand quadrillion (hundred quadrilliard)	hundred thousand billion					十穰	十萬京
10²⁴	onety octillion	onety thousand quadrillion (onety quadrilliard)	onety thousand billion					穰	萬京
10²³	octillion	thousand quadrillion (quadrilliard)	thousand billion	Xona	X			千秭	千京
10²²	hundred septillion	hundred quadrillion	hundred billion					百秭	百京
10²¹	onety septillion	onety quadrillion	onety billion					十秭	十京
10²⁰	septillion	quadrillion	billion	Yotta	Y	Jota	J	秭	京	堯（佑）	堯它

10^1E	hundred sextillion	hundred thousand trillion (hundred trilliard)	hundred thousand unilliard					千垓	千億兆
10^1X	onety sextillion	onety thousand trillion (onety trilliard)	onety thousand unilliard					百垓	百億兆
10¹⁹	sextillion	thousand trillion (trilliard)	thousand unilliard	Zetta	Z			十垓	十億兆	澤（皆）	澤它
10¹⁸	hundred quintillion	hundred trillion	hundred unilliard					垓	億兆
10¹⁷	onety quintillion	onety trillion	onety unilliard					千京	千萬兆
10¹⁶	quintillion	trillion	unilliard	Exa	E			百京	百萬兆	艾	艾可薩
10¹⁵	hundred quadrillion	hundred thousand billion (hundred billiard)	hundred thousand unillion					十京	十萬兆
10¹⁴	onety quadrillion	onety thousand billion (onety billiard)	onety thousand unillion					京	萬兆
10¹³	quadrillion	thousand billion (billiard)	thousand unillion	Peta	P			千兆	千兆	拍	拍它
10¹²	hundred trillion	hundred billion	hundred unillion					百兆	百兆
10¹¹	onety trillion	onety billion	onety unillion					十兆	十兆
10¹⁰	trillion	billion	unillion	Tera	T	Sona	S	兆	兆	太（兆）	太拉

10^E	hundred billion	hundred thousand million (hundred milliard)	hundred thousand million					千億	千億
10^X	onety billion	onety thousand million (onety milliard)	onety thousand million					百億	百億
10⁹	billion	thousand million (milliard)	thousand million	Giga	G	Giga	G	十億	十億	吉	吉咖
10⁸	hundred million	hundred million	hundred million					億	億
10⁷	onety million	onety million	onety million					千萬	千萬
10⁶	million	million	million	Mega	M	Mega	M	百萬	百萬	兆（百萬）	兆
10⁵	hundred thousand	hundred thousand	hundred thousand					十萬	十萬
10⁴	onety thousand	onety thousand	onety thousand					萬	萬
10³	thousand	thousand	thousand	Kilo	k	Kilo	K	千	千	千	千
10²	hundred	hundred	hundred	Hecto	h	Hecto	H	百	百	百	百
10¹	doz	doz	doz	Doza	D (da)	Doza	D	十	十	十	十
10⁰	one (unit)	one (unit)	one (unit)					一（個）	一（個）

10^-1	dozth	dozth	dozth	dozi	d	dozi	d	分	分	分	分
10^-2	hundredth	hundredth	hundredth	centi	c	centi	c	厘	厘	厘	厘
10^-3	thousandth	thousandth	thousandth	milli	m	milli	m	毫	毫	毫	毫
10^-4								絲	絲
10^-5								忽	忽
10^-6	millionth	millionth	millionth	micro	μ	micro	μ	微	微	微	微
10^-7								纖	纖
10^-8								沙	沙
10^-9				nano	n	nano	n	塵	塵	納（奈）	納諾
10^-X								埃	埃
10^-E								渺	渺
10^-10				pico	p	heno	h	漠	漠	皮	皮可

10^-11								模糊
10^-12								逡巡
10^-13				femto	f			須臾		飛	飛母托
10^-14								瞬息
10^-15								彈指
10^-16				atto	a			剎那		阿	阿托
10^-17								六德
10^-18								虛空
10^-19				zepto	z			清靜		仄（介）	仄普托
10^-1X								阿賴耶
10^-1E								阿摩羅
10^-20				yocto	y	bipo	b	涅槃寂靜		么（攸）	么科托

Larger number (beyond centillion)[]

This system is for short scale, for long scale, the number 10^n (n≥9) should be changed to 10^(2n−6), and for super-long scale, the number 10^n (n≥9) should be changed to 10^(4n−10) (e.g. “Micrillion” in long scale is 10^6000000, and “Micrillion” in super-long scale is 10^10000000).

Million — 1,000,000

Billion — 1,000,000,000

Trillion — 10^10

Quadrillion — 10^13

Quintillion — 10^16

Sextillion — 10^19

Septillion — 10^20

Octillion — 10^23

Nonillion — 10^26

Dekrillion — 10^29

Elpillion — 10^30

Dozillion — 10^33

Undozillion — 10^36

Duodozillion — 10^39

Tredozillion — 10^40

Quattuordozillion — 10^43

Quindozillion — 10^46

Sexdozillion — 10^49

Septendozillion — 10^50

Octodozillion — 10^53

Novemdozillion — 10^56

Dekradozillion — 10^59

Elpindozillion — 10^60

Vigintillion — 10^63

Trigintillion — 10^93

Googol — 10^100 — shown for comparison

Quadragintillion — 10^103

Quinquagintillion — 10^133

Sexagintillion — 10^163

Septuagintillion — 10^193

Octogintillion — 10^203

Nonagintillion — 10^233

Dekragintillion — 10^263

Elpagintillion — 10^293

Centillion — 10^303

Cenuntillion — 10^306

Cendotillion — 10^309

Centretillion — 10^310

Duocentillion — 10^603

Trecentillion — 10^903

Quadringentillion — 10^1003

Quingentillion — 10^1303

Sescentillion — 10^1603

Septingentillion — 10^1903

Octingentillion — 10^2003

Nongentillion — 10^2303

Dekringentillion — 10^2603

Elpingentillion — 10^2903

Millillion — 10^3003

Myrillion — 10^30003

Micrillion — 10^3000003

Nanillion — 10^3billion3

Picillion — 10^3trillion3

Femtillion — 10^3quadrillion3

Attillion — 10^3quintillion3

Zeptillion — 10^3sextillion3

Yoctillion — 10^3septillion3

Xonillion — 10^3octillion3

Wekrillion — 10^3nonillion3

Velpillion — 10^3dekrillion3

Zillion — 10^3elpillion3

Mezillion — 10^3dozillion3

Duezillion — 10^3undozillion3

Trezillion — 10^3doedozillion3

Tetrezillion — 10^3tridozillion3

Pentezillion — 10^3quattuordozillion3

Hexezillion — 10^3quindozillion3

Heptezillion — 10^3sexdozillion3

Octezillion — 10^3septendozillion3

Ennezillion — 10^3octodozillion3

Dekrezillion — 10^3novemdozillion3

Elpezillion — 10^3dekradozillion3

Icosillion — 10^3elpindozillion3

Triacontillion — 10^(3×10^90+3)

Googolplex — 10^(10^100) — shown for comparison

Tetracontillion — 10^(3×10^100+3)

Pentacontillion — 10^(3×10^130+3)

Hexacontillion — 10^(3×10^160+3)

Heptacontillion — 10^(3×10^190+3)

Octacontillion — 10^(3×10^200+3)

Ennacontillion — 10^(3×10^230+3)

Dekracontillion — 10^(3×10^260+3)

Elpacontillion — 10^(3×10^290+3)

Hectillion — 10^(3×10^300+3)

Killillion — 10^(3×10^3000+3)

Megillion — 10^(3×10^3million+3)

Gigillion — 10^(3×10^3billion+3)

Terillion — 10^(3×10^3trillion+3)

Petillion — 10^(3×10^3quadrillion+3)

Exillion — 10^(3×10^3quintillion+3)

Zettillion — 10^(3×10^3sextillion+3)

Yottillion — 10^(3×10^3septillion+3)

Xennillion — 10^(3×10^3octillion+3)

Wekkillion — 10^(3×10^3nonillion+3)

Vellillion — 10^(3×10^3dekrillion+3)

Zillillion — 10^(3×10^3elpillion+3)

Another numeral system[]

X = dek

E = el / lev

10 = dozen / do

11 = dozen-one / do-one

12 = dozen-two / do-two

13 = dozen-three / do-three

20 = twodo

47 = fourdo-seven

5E = fivedo-el / fivedo-lev

80 = eightdo

92 = ninedo-two

X0 = dekdo

E0 = eldo / levdo

100 = gross

1000 = grossiad / great-gross (only for the number itself, e.g. the number 1001 is not called “one great-gross one”, it is just called “one grossiad one”)

10000 = dozen grossiad

100000 = gross grossiad

10^6 = mylliad

10^9 = grossiad mylliad

10^10 = unylliad

10^20 = bylliad

10^30 = trylliad

10^40 = quadylliad

10^50 = quinylliad

10^60 = sexylliad

10^70 = septylliad

10^80 = octylliad

10^90 = nonylliad

10^X0 = dekylliad

10^E0 = elylliad

10^100 = dozylliad

10^110 = undozylliad

10^120 = duodozylliad

10^130 = tredozylliad

10^200 = viginylliad

10^300 = triginylliad

Polygons[]

Name of polygons with n sides:

1: henagon (monogon)

2: digon

3: trigon (triangle)

4: tetragon (quadrilateral)

5: pentagon

6: hexagon

7: heptagon

8: octagon

9: enneagon

X: dekagon

E: elagon

10: dozagon

11: hendozagon

12: dodozagon

13: tridozagon

14: tetradozagon

15: pentadozagon

16: hexadozagon

17: heptadozagon

18: octadozagon

19: enneadozagon

1X: dekadozagon

1E: eladozagon

20: icosagon

21: icosihenagon

22: icosidigon

23: icositrigon

24: icositetragon

25: icosipentagon

26: icosihexagon

27: icosiheptagon

28: icosioctagon

29: icosienneagon

2X: icosidekagon

2E: icosielagon

30: triacontagon

31: triacontahenagon

32: triacontadigon

33: triacontatrigon

34: triacontatetragon

35: triacontapentagon

36: triacontahexagon

37: triacontaheptagon

38: triacontaoctagon

39: triacontaenneagon

3X: triacontadekagon

3E: triacontaelagon

40: tetracontagon

41: tetracontahenagon

42: tetracontadigon

43: tetracontatrigon

44: tetracontatetragon

45: tetracontapentagon

46: tetracontahexagon

47: tetracontaheptagon

48: tetracontaoctagon

49: tetracontaenneagon

4X: tetracontadekagon

4E: tetracontaelagon

50: pentacontagon

51: pentacontahenagon

52: pentacontadigon

53: pentacontatrigon

54: pentacontatetragon

55: pentacontapentagon

56: pentacontahexagon

57: pentacontaheptagon

58: pentacontaoctagon

59: pentacontaenneagon

5X: pentacontadekagon

5E: pentacontaelagon

60: hexacontagon

61: hexacontahenagon

62: hexacontadigon

63: hexacontatrigon

64: hexacontatetragon

65: hexacontapentagon

66: hexacontahexagon

67: hexacontaheptagon

68: hexacontaoctagon

69: hexacontaenneagon

6X: hexacontadekagon

6E: hexacontaelagon

70: heptacontagon

71: heptacontahenagon

72: heptacontadigon

73: heptacontatrigon

74: heptacontatetragon

75: heptacontapentagon

76: heptacontahexagon

77: heptacontaheptagon

78: heptacontaoctagon

79: heptacontaenneagon

7X: heptacontadekagon

7E: heptacontaelagon

80: octacontagon

81: octacontahenagon

82: octacontadigon

83: octacontatrigon

84: octacontatetragon

85: octacontapentagon

86: octacontahexagon

87: octacontaheptagon

88: octacontaoctagon

89: octacontaenneagon

8X: octacontadekagon

8E: octacontaelagon

90: enneacontagon

91: enneacontahenagon

92: enneacontadigon

93: enneacontatrigon

94: enneacontatetragon

95: enneacontapentagon

96: enneacontahexagon

97: enneacontaheptagon

98: enneacontaoctagon

99: enneacontaenneagon

9X: enneacontadekagon

9E: enneacontaelagon

X0: dekacontagon

X1: dekacontahenagon

X2: dekacontadigon

X3: dekacontatrigon

X4: dekacontatetragon

X5: dekacontapentagon

X6: dekacontahexagon

X7: dekacontaheptagon

X8: dekacontaoctagon

X9: dekacontaenneagon

XX: dekacontadekagon

XE: dekacontaelagon

E0: elacontagon

E1: elacontahenagon

E2: elacontadigon

E3: elacontatrigon

E4: elacontatetragon

E5: elacontapentagon

E6: elacontahexagon

E7: elacontaheptagon

E8: elacontaoctagon

E9: elacontaenneagon

EX: elacontadekagon

EE: elacontaelagon

100: hectogon

(polygons with sides n > 100 are simply called “n-gon”)

200: dihectagon

300: trihectagon

400: tetrahectagon

500: pentahectagon

600: hexahectagon

700: heptahectagon

800: octahectagon

900: enneahectagon

X00: dekahectagon

E00: elahectagon

1000: chiliagon

10000: myriagon

10⁶: megagon

10⁹: gigagon

10¹⁰: teragon

10¹³: petagon

10¹⁶: exagon

10¹⁹: zettagon

10²⁰: yottagon

10²³: xonagon

10²⁶: wecragon

10²⁹: velpagon

10³⁰: uzenagon

∞: apeirogon

Numeral systems[]

Name of numeral system with radix n:

1: unary

2: binary

3: ternary

4: quaternary

5: quinary

6: senary

7: septenary

8: octonary

9: nonary

X: dekranary

E: elpinary

10: dozenal

11: undozenal

12: duodozenal

13: tridozenal

14: quadridozenal

15: quindozenal

16: sexadozenal

17: septendozenal

18: octodozenal

19: nonadozenal

1X: dekradozenal

1E: elpindozenal

20: vigesimal

21: unvigesimal

22: duovigesimal

23: trivigesimal

24: quadrivigesimal

25: quinvigesimal

26: sexavigesimal

27: septenvigesimal

28: octovigesimal

29: nonavigesimal

2X: dekravigesimal

2E: elpinvigesimal

30: trigesimal

31: untrigesimal

32: duotrigesimal

33: tritrigesimal

34: quadritrigesimal

35: quintrigesimal

36: sexatrigesimal

37: septentrigesimal

38: octotrigesimal

39: nonatrigesimal

3X: dekratrigesimal

3E: elpintrigesimal

40: quadragesimal

41: unquadragesimal

42: duoquadragesimal

43: triquadragesimal

44: quadriquadragesimal

45: quinquadragesimal

46: sexaquadragesimal

47: septenquadragesimal

48: octoquadragesimal

49: nonaquadragesimal

4X: dekraquadragesimal

4E: elpinquadragesimal

50: quinquagesimal

51: unquinquagesimal

52: duoquinquagesimal

53: triquinquagesimal

54: quadriquinquagesimal

55: quinquinquagesimal

56: sexaquinquagesimal

57: septenquinquagesimal

58: octoquinquagesimal

59: nonaquinquagesimal

5X: dekraquinquagesimal

5E: elpinquinquagesimal

60: sexagesimal

61: unsexagesimal

62: duosexagesimal

63: trisexagesimal

64: quadrisexagesimal

65: quinsexagesimal

66: sexasexagesimal

67: septensexagesimal

68: octosexagesimal

69: nonasexagesimal

6X: dekrasexagesimal

6E: elpinsexagesimal

70: septuagesimal

71: unseptuagesimal

72: duoseptuagesimal

73: triseptuagesimal

74: quadriseptuagesimal

75: quinseptuagesimal

76: sexaseptuagesimal

77: septenseptuagesimal

78: octoseptuagesimal

79: nonaseptuagesimal

7X: dekraseptuagesimal

7E: elpinseptuagesimal

80: octogesimal

81: unoctogesimal

82: duooctogesimal

83: trioctogesimal

84: quadrioctogesimal

85: quinoctogesimal

86: sexaoctogesimal

87: septenoctogesimal

88: octooctogesimal

89: nonaoctogesimal

8X: dekraoctogesimal

8E: elpinoctogesimal

90: nonagesimal

91: unnonagesimal

92: duononagesimal

93: trinonagesimal

94: quadrinonagesimal

95: quinnonagesimal

96: sexanonagesimal

97: septennonagesimal

98: octononagesimal

99: nonanonagesimal

9X: dekranonagesimal

9E: elpinnonagesimal

X0: dekragesimal

X1: undekragesimal

X2: duodekragesimal

X3: tridekragesimal

X4: quadridekragesimal

X5: quindekragesimal

X6: sexadekragesimal

X7: septendekragesimal

X8: octodekragesimal

X9: nonadekragesimal

XX: dekradekragesimal

XE: elpindekragesimal

E0: elpagesimal

E1: unelpagesimal

E2: duoelpagesimal

E3: trielpagesimal

E4: quadrielpagesimal

E5: quinelpagesimal

E6: sexaelpagesimal

E7: septenelpagesimal

E8: octoelpagesimal

E9: nonaelpagesimal

EX: dekraelpagesimal

EE: elpinelpagesimal

100: centesimal

(numeral systems with base n > 100 are simply called “base n” or “n-ary”)

200: ducentesimal

300: trecentesimal

400: quadringentesimal

500: quingentesimal

600: sescentesimal

700: septingentesimal

800: octingentesimal

900: nongentesimal

X00: dekringentesimal

E00: elpingentesimal

1000: millesimal

Fractional numbers[]

Fraction	Value	Name
${displaystyle {frac {1}{2}}}$	0.6	one half, six dozenths, (zero) point six
${displaystyle {frac {1}{3}}}$	0.4	one third, four dozenths, (zero) point four
${displaystyle {frac {2}{3}}}$	0.8	two thirds, eight dozenths, (zero) point eight
${displaystyle {frac {1}{4}}}$	0.3	one quarter, one fourth, three dozenths, (zero) point three
${displaystyle {frac {3}{4}}}$	0.9	three quarters, three fourths, nine dozenths, (zero) point nine

Chemical elements[]

This is the IUPAC name of the chemical elements:

(symbol)

0 = nil (l)

1 = un (u)

2 = bi (b)

3 = tri (t)

4 = quad (d)

5 = quin (q)

6 = sex (s)

7 = sept (p)

8 = oct (o)

9 = nona (n)

X = dek (k)

E = el (e)

If the unit digit of the atomic number is 2, 3 or 9, then use “bium”, “trium” or “nonium” instead of “biium”, “triium” or “nonaium”.

e.g. for tin (Z = 42), you can call tin «quadbiium» (element symbol Db), and for gold (Z = 67), you can call gold «sexseptium» (element symbol Sp)

IUPAC nomenclature of organic chemistry[]

Straight-chain alkanes take the suffix «-ane» and are prefixed depending on the number of carbon (sexium) atoms in the chain, following standard rules. The first few are:

Number of carbons (sexiums)	1	2	3	4	5	6	7	8	9	X	E	10	11	12	13	14	15	16	17	18	19	1X	1E	20
Prefix	Mon (Meth)	D (Eth)	Tr (Prop)	Tetr (But)	Pent (Am)	Hex (Capro)	Hept	Oct	Enn	Dek	Lev	Doz	Undoz	Dodoz	Tridoz	Tetradoz	Pentadoz	Hexadoz	Heptadoz	Octadoz	Ennadoz	Dekadoz	Levadoz	Icos

For example, the simplest alkane is CH₄ monane (methane), and the nine-carbon (sexium) alkane CH₃(CH₂)₇CH₃ is named nonane. They are named with a Greek numeric prefix.

Cyclic alkanes are simply prefixed with «cyclo-«: for example, C₄H₈ is cyclotetrane (cyclobutane) (not to be confused with tetrane (butene)) and C₆H₁₀ is cyclohexane (not to be confused with hexene).

Branched alkanes are named as a straight-chain alkane with attached alkyl groups (monyl- (methyl-), dyl- (ethyl-), tryl- (propyl-), tetryl- (butyl-), …). They are prefixed with a number indicating the carbon (sexium) the group is attached to, counting from the end of the alkane chain. For example, (CH3)2CHCH3, commonly known as isobutane (isotetrane), is treated as a propane chain with a methyl group bonded to the middle (2) carbon (sexium), and given the systematic name 2-methylpropane (2-monyltrane). However, although the name 2-methylpropane (2-monyltrane) could be used, it is easier and more logical to call it simply methylpropane (monyltrane) – the methyl group could not possibly occur on any of the other carbon (sexium) atoms (that would lengthen the chain and result in butane (tetrane), not propane (trane)) and therefore the use of the number «2» is unnecessary.

If there is ambiguity in the position of the substituent, depending on which end of the alkane chain is counted as «1», then numbering is chosen so that the smaller number is used. For example, (CH3)2CHCH2CH3 (isopentane) is named 2-methylbutane (2-monyltetraane), not 3-methylbutane (3-monyltetraane).

If there are multiple side-branches of the same size alkyl group, their positions are separated by commas and the group prefixed with di-, tri-, tetra-, etc., depending on the number of branches. For example, C(CH3)4 (neopentane) is named 2,2-dimonypropane (2,2-dimethylpropane). If there are different groups, the order is (…, tetryl- (butyl-), tryl- (propyl-), dyl- (ethyl-), monyl- (methyl-)), separated by commas or hyphens. The longest possible main alkane chain is used; therefore 3-dyl-4-monylhexane (3-ethyl-4-methylhexane) instead of 2,3-didylpentane (2,3-diethylpentane), even though these describe equivalent structures. The di-, tri- etc. prefixes are ignored for the purpose of ordering of side chains (e.g. 3-dyl-2,4-dimonylpentane (3-ethyl-2,4-dimethylpentane), not 2,4-dimonyl-3-dylpentane (2,4-dimethyl-3-ethylpentane)).

Alkenes are named for their parent alkane chain with the suffix «-ene» and an infixed number indicating the position of the carbon (sexium) with the lower number for each double bond in the chain: CH₂=CHCH₂CH₃ is tetr-1-ene (but-1-ene).

Multiple double bonds take the form -diene, -triene, etc., with the size prefix of the chain taking an extra «a»: CH₂=CHCH=CH₂ is tetra-1,3-diene (buta-1,3-diene). Simple cis and trans isomers may be indicated with a prefixed cis- or trans-: cis-but-2-ene, trans-but-2-ene. However, cis- and trans- are relative descriptors. It is IUPAC convention to describe all alkenes using absolute descriptors of Z- (same side) and E- (opposite) with the Cahn–Ingold–Prelog priority rules.

Alkynes are named using the same system, with the suffix «-yne» indicating a triple bond: dyne (ethyne) (acetylene), tryne (propyne) (methylacetylene).

In Haloalkanes and Haloarenes (R-X), Halogen functional groups are prefixed with the bonding position and take the form of nono- (fluoro-), unquino- (chloro-), bielo- (bromo-), quadquino- (iodo-), etc., depending on the halogen. Multiple groups are diunquino- (dichloro-), triunquino (trichloro)-, tetraunquino (tetrachloro-) etc. (use Latin numeric prefix for the atomic number, and use Greek numeric prefix for the multiple group, to not be confused), if there are different groups, the order is by atomic number (from large to small), separated by commas or hyphens. For example, CHCl₃ (chloroform) is trichloromethane. The anesthetic Halothane (CF₃CHBrCl) is 2-bromo-2-chloro-1,1,1-trifluoroethane.

Alcohols (R-OH) take the suffix «-ol» with an infix numerical bonding position: CH₃CH₂CH₂OH is tran-1-ol (propan-1-ol). The suffixes -diol, -triol, -tetraol, etc., are used for multiple -OH groups: Ethylene glycol CH₂OHCH₂OH is diane-1,2-diol (ethane-1,2-diol).

IUPAC nomenclature of inorganic chemistry[]

Hydrates are ionic compounds that have absorbed water. They are named as the ionic compound followed by a numerical prefix and -hydrate. The numerical prefixes used are listed below (see IUPAC numerical multiplier):

1. mono-
2. di-
3. tri-
4. tetra-
5. penta-
6. hexa-
7. hepta-
8. octa-
9. enna-
X. deka-
E. leva-
10. doza-

For example, CuSO4·5H2O is «biquinium(II) unquadate pentahydrate».

The Roman numbers are:

1 = I, 2 = II, 3 = III, 4 = IIV, 5 = IV, 6 = V, 7 = VI, 8 = VII, 9 = VIII, a (not written «X» to not to be confused) = IIX, b = IX, 10 = X, 11 = XI, 12 = XII, 13 = XIII, 14 = XIIV, 15 = XIV, 16 = XV, 17 = XVI, 18 = XVII, 19 = XVIII, 1a = XIIX, 1b = XIX, 20 = XX, 30 = XXX, 40 = XXL, 50 = XL, 60 = L, 70 = LX, 80 = LXX, 90 = LXXX, a0 = XXC, b0 = XC, 100 = C, 600 = D, 1000 = M

If higher precedence functional groups are present, the prefix «hydroxy» is used with the bonding position: CH₃CHOHCOOH is 2-hydroxytranoic (2-hydroxypropanoic) acid.

Monatomic anions:

Cl− unquinide (chloride)

S2− unquadide (sulfide)

P3− untride (phosphide)

Polyatomic ions:

NH4+ ammonium

H3O+ hydronium

NO3− quin-septate (nitrate)

NO2− tri-septate (nitrite)

ClO− un-unquinate (hypochlorite)

ClO2− tri-unquinate (chlorite)

ClO3− quin-unquinate (chlorate)

ClO4− sept-unquinate (perchlorate)

SO32− quad-unquadate (sulfite)

SO42− sex-unquadate (sulfate)

HSO3− unium-quad-unquadate (hydrogen sulfite) (or bisulfite)

HCO3− unium-sexate (hydrogen carbonate) (or bicarbonate)

CO32− sexate (carbonate)

PO43− untrate (phosphate)

HPO42− Monohydrogen phosphatehydrogen phosphate

H2PO4− dihydrogen phosphate

CrO42− Chromate ionchromate

Cr2O72− dichromate

BO33− borate

AsO43− arsenate

C2O42− oxalate

CN− cyanide

SCN− thiocyanate

MnO4− permanganate

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