Number to Ordinal Converter

English expresses position with a small set of suffix rules: first, second, third, fourth — and after that the pattern collapses into st, nd, rd and th endings decided by the final digit. The rules are easy for a computer and surprisingly easy for a human to get wrong: 21st is right but 21th is not, 113th beats 113rd, and 12th quietly rejects 12nd. Every document that orders things — schedules, lists, prize placings, editions, versions — depends on these endings being correct.

Number to Ordinal Converter turns any cardinal number into its ordinal form instantly: 1 becomes 1st, 22 becomes 22nd, 113 becomes 113th, and a million becomes 1,000,000th. It can also write the ordinal in words — twenty-second, one hundred and thirteenth — with American or British "and" style, convert pasted batches of up to 10,000 values at once, and generate numbered sequences like 1st through 21st in a single click. Everything runs in your browser, and nothing is uploaded.

• Instant conversion: The ordinal appears as you type, for a single value or a whole pasted batch.
• Spelled-out words: Optionally write the ordinal in English — twenty-second, one hundred thirteenth — with hyphens and "and" handled correctly.
• American or British style: Toggle the "and" inside multi-group numbers to match your dialect.
• Batch mode: Paste up to 10,000 numbers separated by new lines, commas or spaces and convert them all at once.
• Range generator: Produce the full sequence from any start to any end with any step — 1st, 2nd, 3rd … 21st, or every tenth ordinal.
• Any size integer: Suffix rules work for numbers of any length; spelled words stay exact up to the 66-digit vigintillion scale.
• Negatives and zero: -7 becomes -7th and 0 becomes zeroth, the two cases everyone forgets.
• Thousand grouping: Display 1,000,000th instead of 1000000th when readability matters.
• Copy or download: Take the result to the clipboard or save it as a text file, one ordinal per line.
• Free and private: Every conversion happens locally in your browser; nothing is uploaded or stored.

1. Type or paste numbers into the input box — a single value, or a batch separated by new lines, commas or spaces.
2. Tick "Spelled-out words" if you also want first, second and third written in English.
3. Tick "British style (and)" for forms like one hundred and second; leave it unticked for one hundred second.
4. Check the result — each ordinal appears with its original value, plus the word form when enabled.
5. Use the Range tab to generate sequences such as 1st to 21st, with a from, to and step value.
6. Copy or download the list for documents, schedules, labels or code.

Example 1 — A simple schedule. Enter 1, 2 and 3. The tool returns 1st, 2nd and 3rd — the endings that set the pattern for everything after them.

Example 2 — The 11-13 trap. Enter 11, 12 and 13. The result is 11th, 12th and 13th, not 11st, 12nd and 13rd — the exception that catches nearly everyone.

Example 3 — A pasted spreadsheet column. Paste 1,000 numbers from a results sheet separated by new lines. The batch converter tells 1,000-style grouping commas apart from 1, 22, 33-style separators, so nothing is silently merged.

Example 4 — Words and style. Enter 1001 with words enabled. American style writes one thousand first; switch to British style and it becomes one thousand and first.

Example 5 — A numbered sequence. Use the Range tab with from 1, to 21 and step 2. The output is 1st, 3rd, 5th … 21st — the odd positions of a tournament bracket, ready to paste.

• No more suffix guessing: The st, nd, rd and th logic, including the 11-12-13 exception, is applied exactly every time.
• Batch speed: Ten thousand values convert in a single run, so pasted lists and spreadsheet columns take one click.
• Both English conventions: American and British "and" styles are one checkbox apart.
• Exact at any size: Endings work for numbers of arbitrary length, and word forms are precise to the 66-digit vigintillion scale.
• Words when you need them: The spelled form, with correct hyphens, covers documents that require full English ordinals.
• Private and free: All conversion happens in the browser; nothing is uploaded, stored or logged.