Ordinal Number Converter

Whenever the last two digits fall between 11 and 13, English uses th regardless of the final digit. So you get 11th, 12th and 13th, not 11st, 12nd or 13rd. The tool checks the last two digits first, then falls back to the last digit for everything else.

Outside the 11 to 13 range, the suffix follows the last digit: 1 takes st, 2 takes nd, 3 takes rd and every other digit takes th. That gives 21st, 22nd and 23rd, and also 41st, 62nd and 93rd.

Their last two digits are in the 11 to 13 band, so they all end in th: 111th, 112th and 113th. The pattern resets afterwards, so 121 returns to 121st and 122 to 122nd.

Yes. The In words output covers whole numbers from 0 to 1000, for example zeroth, twenty-first, one hundredth and one thousandth. It uses the British style with and, so 101 reads as one hundred and first.

The numeric ordinal works for any whole number, so 5280 gives 5280th. The written words are only generated for 0 through 1000, and decimals are not ordinals, so a value like 3.5 is rejected with a prompt to enter a whole number.

For the numeric form, yes. It uses the size of the number to pick the suffix and keeps the sign, so -1 becomes -1st and -21 becomes -21st. Written words are not produced for negatives, since ordinal words describe forward position in a sequence.

Zero returns 0th and the word zeroth. Zeroth is used in fields like computing and physics, where counting sometimes starts from a zeroth item, so the tool spells it rather than treating zero as invalid.

The tool converts one number at a time so each result stays clear and copyable. For a batch, the tool ships a JSON API you can call per value, which returns the number, its ordinal and its words in one response.

Yes. The conversion runs entirely in your browser with plain arithmetic and lookup tables. Nothing you type is sent to a server or stored.