Roman Numeral Converter

All tools

Convert numbers to Roman numerals and back, from 1 to 3999. See a place-by-place breakdown and instant validity checks. Free and accurate.

Enter a whole number from 1 to 3999.
Enter a valid Roman numeral, e.g. MMXXIV.
Result –
Breakdown
  • –
Roman numerals run from I (1) to MMMCMXCIX (3999).
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