13 in Roman Numerals

13 in Roman numerals is
XIII
10 + 1 + 1 + 1 = 13
Open the full converter

The number 13 is written XIII in Roman numerals. Reading left to right and adding the values gives 10 + 1 + 1 + 1 = 13. 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).

XIII in names

  • Leo XIII, Pope of the Catholic Church from 1878 to 1903 (1810–1903). Wikidata
  • Gregory XIII, pope of the Catholic Church from 1572 to 1585 (1502–1585). Wikidata
  • Louis XIII of France, King of France and Navarre from 1610 to 1643 (1601–1643). Wikidata
  • Clement XIII, pope of the Catholic Church from 1758 to 1769. Wikidata
  • Benedict XIII, pope of the Catholic Church from 1724 to 1730. Wikidata
  • Alfonso XIII, King of Spain from 1886 to 1931 (1886–1941). Wikidata
  • Innocent XIII, pope of the Catholic Church from 1721 to 1724. Wikidata
  • John XIII, Head of the Catholic Church from 965 to 972. Wikidata
  • Charles XIII of Sweden, King of Sweden (1809-1818) and King of Norway (1814-1818). Wikidata
  • Super Bowl XIII, played on 21 January 1979. Wikidata

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

Nearby & popular values

11 = XI12 = XII14 = XIV15 = XV
4 = IV9 = IX14 = XIV40 = XL49 = XLIX90 = XC99 = XCIX100 = C500 = D1000 = M1984 = MCMLXXXIV1990 = MCMXC1999 = MCMXCIX2000 = MM2024 = MMXXIV2025 = MMXXV2026 = MMXXVI3999 = MMMCMXCIX

Frequently asked

What is 13 in Roman numerals?

13 in Roman numerals is XIII.

How is 13 written in Roman numerals?

13 is written XIII, which breaks down as 10 + 1 + 1 + 1 = 13.

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.