Roman Numerals
Convert numbers from 1 to 3999 to and from standard Roman numerals.
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How to Use
- Type a number to see the Roman numeral.
- Or type a numeral to see the number.
- Invalid forms are rejected.
- Copy the numeral or reset.
FAQ
What is the range?
1 through 3999, using standard subtractive forms such as IV and IX.
Is IIII accepted?
No. Only the standard form, IV, is accepted for 4.