Roman numeral converter

Convert any Roman numeral to an Arabic numeral. See formula to understand Roman numerals letter by letter.


Convert Roman number:


=

Formula:


This converter accepts Roman numerals in conventional, alternative and archaic forms. It does not verify the number you type is in a format that is common today.

1 = I 5 = V 10 = X 100 = C 500 = D 1,000 = M
Archaic Roman numbers
6 = 50 = 500 = IↃ 1,000 = CIↃ = ↀ 5,000 = IↃↃ = ↁ 10,000 = CCIↃↃ = ↂ 50,000 = IↃↃↃ = ↇ 100,000 = CCCIↃↃↃ = ↈ 500,000 = IↃↃↃↃ 1,000,000 = CCCCIↃↃↃↃ

All archaic forms might not show up due to missing font support. See special numbers. For easier input, you may type I) for 500, (I) for 1,000 etc.

Convert Arabic to Roman? See Roman numerals complete list.

©Tuomas Salste