Ordinal Number Converter

Enter any cardinal number and instantly get its ordinal numeral (22nd) and word form (twenty-second).

Numeral form
Word form
Quick examples

Ordinal Suffix Rules

-st
Ends in 1 (except 11): 1st, 21st, 31st, 101st…
-nd
Ends in 2 (except 12): 2nd, 22nd, 32nd, 102nd…
-rd
Ends in 3 (except 13): 3rd, 23rd, 33rd, 103rd…
-th
All others, including 11th, 12th, 13th: 4th, 10th, 11th, 12th, 13th, 111th, 112th…

Common examples

1th* first
2th* second
3th* third
4th* fourth
5th* fifth
10th* tenth
11th* eleventh
12th* twelfth
13th* thirteenth
20th* twentieth
21th* twenty-first
100th* one hundredth
1000th* one thousandth

* Displayed suffix is illustrative; the converter applies the correct suffix automatically.

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Summary

Enter any cardinal number and instantly get its ordinal numeral (22nd) and word form (twenty-second).

How it works

  1. Type or paste a whole number (0–999,999,999,999) into the input field.
  2. The tool detects the correct suffix (–st, –nd, –rd, or –th) and displays the numeral ordinal.
  3. The word-form engine expands the number into English words, then appends the ordinal ending (–first, –second, –third, –th).
  4. Use the Copy buttons next to each result to copy either form to your clipboard.
  5. Convert a batch of numbers by typing one per line in the bulk-conversion panel.

Use cases

  • Writing dates and position rankings in formal documents.
  • Generating ordinal labels for leaderboards and competition results.
  • Teaching or checking ordinal number rules in English.
  • Automating caption or title generation that requires ordinal words.
  • Formatting footnotes and endnotes with correct ordinal numbering.
  • Producing ordered list headings with fully spelled-out word forms.
  • Verifying the correct suffix for irregular values like 11th, 12th, and 13th.
  • Bulk-converting lists of cardinal numbers to their ordinal equivalents.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu