Roman Numeral Converter
Convert numbers to Roman numerals and Roman numerals back to numbers.
🔒 Runs in your browser. Nothing you enter is uploaded or stored.
How to use it
Type in either box. Roman numerals use I=1, V=5, X=10, L=50, C=100, D=500 and M=1000, with subtractive pairs such as IV (4), IX (9), XL (40) and CM (900). The standard form covers 1 to 3999.
FAQ
Is IIII ever correct?
IIII appears on many clock faces by tradition, but the standard form for 4 is IV.
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