Number 100-1000 in English

1. Cardinal numbers

Cardinal numbers are the numbers that we use for counting or designating quantity : English-speakers use them every day – one two three four etc. In terms of grammar, they belong to the category of determining adjectives.

From 0 to 100 – From zero to a hundred

The number 0 is variously expressed as nought (in British English) or zero (in all forms of English) : in the middle of a series of digits, it may also be pronounced “oh”. Everyone has heard of James Bond, also known as 007. That is pronounced “oh-oh-seven” or “double-oh-seven”, but never “nought-nought-seven” nor “zero-zero-seven”.

Here are the important cardinal numbers between one and a hundred, which can serve as models for other numbers.

Key numbers from 0 to 100 as numerals and as written words
1	one	11	eleven	21	twenty-one
2	two	12	twelve	22	twenty-two
3	three	13	thirteen	30	thirty
4	four	14	fourteen	40	forty
5	five	15	fifteen	50	fifty
6	six	16	sixteen	60	sixty
7	seven	17	seventeen	70	seventy
8	eight	18	eighteen	80	eighty
9	nine	19	nineteen	90	ninety
10	ten	20	twenty	100	a hundred

Watch out for spelling: fourteen but forty.

Numbers from 101 to 999 – three-digit numbers

Important: the examples and rules below illustrate British usage.
In the USA, the word and is normally omitted.
A hyphen (-) is normally used in numbers between 21 and 99, whether these stand alone or are part of a larger number.

From these examples, all other three-digit numbers in English can be formed.

Key three-figure numbers from 100 to 999 as numerals and as written words
101	a hundred and one	365	three hundred and sixty-five
111	a hundred and eleven	480	four hundred and eighty
121	a hundred and twenty-one	545	five hundred and forty-five
133	a hundred and thirty-three	644	six hundred and forty-four
257	two hundred and fifty-seven	799	seven hundred and ninety-nine

Notes :

The word “hundred” , except as a round number (a number ending in 00), is always followed by “and“, both in spoken British English and in written English when long numbers are written out as words.

The word hundred never takes an “s” as part of a cardinal number.
For numbers between 100 and 199, one normally says “a hundred” and not “one hundred“.
The expression “one hundred” is used only to put emphasis on the figure one (i.e. one, not two nor three), or to stress the word.

Example:
I counted one hundred and twenty planes (and not 220 nor 320)

Hundreds in the plural

The words hundred, thousand and million never take an s in the plural as cardinal numbers (which are a form of adjective).
They only take an s when used as nouns designating an imprecise quantity of hundreds or thousands, etc., followed by of …
Examples