Roman numerals are number system used in ancient Rome, and the numbers are represented by the I, V, X, L, C, D and M symbols. We often count Olympics and NFL Championship games in Roman Numerals, and trying to convert a large number is not a trivial task. Use our online Roman Numerals to Whole Number converter to convert the numbers between them. Enter a whole number such as 31, or a Roman numeral such as XXXI in the appropriate box, and click Convert button. The input must be in the range of 1 - 4999, or I to MMMMCMXCIX.

Roman Numerals

Roman Numerals use 7 basic symbols, and each represents a specific number. However, depending on the order where the symbols are placed determines whether you add or subtract the values. The numbers are written from Left to Right, and if one or more letters are placed after a letter of a greater value, you add. If the the number comes before a letter of greater value, you subtract. For example, XI (X=10, I=1) represents 11 while IX represents 9.