Roman Numeral Converter
Numbers to Roman numerals and back
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About this calculator
Type a number from 1 to 3,999 to get its Roman numeral, or type a Roman numeral to get the number. The converter validates the numeral format.
The formula
I=1, V=5, X=10, L=50, C=100, D=500, M=1000; a smaller symbol before a larger one is subtracted
Worked example1994 = MCMXCIV (1000 + 900 + 90 + 4).
Frequently asked questions
Why stop at 3,999?
Standard notation has no symbol above M, so MMMCMXCIX is the largest.
Is there a zero?
No. Romans had no symbol for zero.
How is 4 written?
IV, one before five. 9 is IX.
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