Roman Numeral Converter
Convert numbers to Roman numerals and Roman numerals back to numbers (1–3999).
About Roman Numeral Converter
Convert standard integers into Roman numerals and decode Roman numerals back into ordinary numbers. The tool covers the classic range 1 to 3999 and validates input in both directions so you always get a correct, well-formed result. It runs entirely in your browser — great for tattoos, clock faces, dates and homework.
How to use Roman Numeral Converter
- 1
Choose a direction: Number → Roman or Roman → Number.
- 2
Type your value into the input box.
- 3
Read the converted result and copy it.
Frequently Asked Questions
Why is the range limited to 3999?
Standard Roman numerals only use the symbols I, V, X, L, C, D and M, which top out at 3999 (MMMCMXCIX) without special overline notation for larger values.
Does it validate Roman numerals?
Yes. It rejects malformed numerals (like IIII or VX) and only accepts properly formed sequences.
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