How to use Roman Numeral Converter
- Enter a number from 1 to 3999, or a Roman numeral such as MCMXCIV.
- The conversion appears immediately.
- Copy the result.
About this tool
Roman numerals use the letters I, V, X, L, C, D and M, and write 4 as IV and 9 as IX using subtractive notation. The standard system covers 1 to 3999 because it has no symbol for 5000 or zero.
Invalid sequences such as IIII or VX are rejected.
Frequently Asked Questions
- Why does it stop at 3999?
- Classical Roman numerals have no standard symbols beyond M, so 4000 and above are not covered.
- Is lowercase accepted?
- Yes. Input is converted to capitals before parsing.
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