This tool converts ordinary numbers into Roman numerals and Roman numerals back into numbers, instantly and locally — handling values from 1 up to 3999.
How to use it
- Type a number to see its Roman numeral, or type a Roman numeral to see the number.
- The conversion is instant.
- Copy the result.
About Roman Numeral Converter
Roman numerals still appear in clock faces, book chapters, movie credits, monument dates and outline numbering. Reading or writing larger ones (is MCMXCIV 1994?) takes effort and is easy to get wrong. This converter handles both directions and validates the numeral, so you can decode an inscription or produce a numeral for a design without second-guessing. It runs entirely in your browser.
FAQ
What range is supported?
Standard Roman numerals cover 1 to 3999. There is no symbol for zero, and larger values need special notation.
What is MCMXCIV?
It is 1994 — M (1000) + CM (900) + XC (90) + IV (4).
How do Roman numerals represent large numbers?
Roman numerals combine the symbols I, V, X, L, C, D and M using addition and subtraction (IV is 4, IX is 9). Standard notation goes up to 3999 (MMMCMXCIX); larger numbers historically used a bar over a numeral to multiply it by 1000.