Roman Numerals
Reference & Converter

Convert any number from 1 to 3,999 instantly. Each number has a dedicated page with full breakdown.

Convert any number — 1 to 3,999,999
Popular numbers
1I 4IV 9IX 10X 40XL 50L 90XC 100C 400CD 500D 900CM 1000M 1776MDCCLXXVI 1900MCM 2000MM 2025MMXXV
Reference Charts
1–100 100–1,000 1,000–3,999 Common Years Months Multiplication
Learn

New to Roman numerals? The How It Works page explains the system from scratch — symbols, rules, and subtractive notation.

Numbers above 3,999? See the Extended Notation page for vinculum (overline) notation.