9 in Roman Numerals

9 in Roman numerals is
IX
9 = 9
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The number 9 is written IX in Roman numerals. Reading left to right and adding the values gives 9 = 9. Roman numerals use seven letters: I (1), V (5), X (10), L (50), C (100), D (500) and M (1000). A smaller letter before a larger one means subtraction (IV = 4, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900).

IX in names

  • Pius IX, Pope of the Catholic Church from 1846 to 1878. Wikidata
  • Louis IX of France, King of France from 1226 to 1270 (1214–1270). Wikidata
  • Gregory IX, pope of the Catholic Church from 1227 to 1241. Wikidata
  • Clement IX, pope from 1667, lived 1600-1669. Wikidata
  • Leo IX, Head of the Catholic Church from 1049 to 1054. Wikidata
  • Benedict IX, Pope of the Catholic Church. Wikidata
  • John IX, pope. Wikidata
  • Charles IX of France, King of France (1550–1574). Wikidata
  • Innocent IX, pope of the Catholic Church in 1591 (1519–1591). Wikidata
  • Boniface IX, pope of the Catholic Church from 1389 to 1404. Wikidata
  • Stephen IX, pope. Wikidata
  • Christian IX of Denmark, King of Denmark from 1863 to 1906. Wikidata

Popes, monarchs, films and Super Bowls whose name carries IX. Source: Wikidata, retrieved 11 October 2026.

Nearby & popular values

7 = VII8 = VIII10 = X11 = XI
4 = IV14 = XIV40 = XL49 = XLIX90 = XC99 = XCIX100 = C500 = D1000 = M1984 = MCMLXXXIV1990 = MCMXC1999 = MCMXCIX2000 = MM2024 = MMXXIV2025 = MMXXV2026 = MMXXVI3999 = MMMCMXCIX

Frequently asked

What is 9 in Roman numerals?

9 in Roman numerals is IX.

How is 9 written in Roman numerals?

9 is written IX, which breaks down as 9 = 9.

Is there a Roman numeral for zero?

No. The Roman system has no symbol for zero, which is one reason it was eventually replaced for calculation.