Roman Numerals Converter
Convert between Roman numerals (I, V, X, L, C, D, M) and decimal numbers. Supports 1–3999.
Result:
What are Roman Numerals?
Roman numerals use letters: I=1, V=5, X=10, L=50, C=100, D=500, M=1000. Numbers are formed by combining and subtracting (e.g. IV=4, IX=9). This tool converts between Roman and decimal (1–3999).
What is it used for?
- Outlines: Numbered lists (I, II, III)
- Chapters: Book chapters, copyright years
- Clocks: Traditional clock faces
- Education: History, math exercises
Rules
Subtraction: I before V or X, X before L or C, C before D or M. Example: 1994 = MCMXCIV.