Roman Numeral Converter

Convert whole numbers from 1 to 3,999 into Roman numerals and convert Roman numerals back to numbers.

How it works

Standard Roman numerals use I, V, X, L, C, D and M with subtractive notation such as IV for 4.

Supports standard Roman numerals for integers 1 through 3,999 only. Zero, fractions and extended overline notation are not supported.