How to Calculate Roman Numerals

What is Roman Numerals?

Roman numerals are a numeral system originating in ancient Rome, using letters from the Latin alphabet: I(1), V(5), X(10), L(50), C(100), D(500), M(1000). Smaller values before larger values are subtracted; otherwise they are added.

Step-by-Step Guide

1. 1Read left to right; if a smaller value precedes a larger, subtract it
2. 2IV = 4 (5−1), IX = 9 (10−1), XL = 40, XC = 90, CD = 400, CM = 900
3. 3Maximum 3 of the same consecutive symbol (III=3, XXX=30, MMM=3000)
4. 4Additive: VI = 6, LX = 60, DC = 600

Worked Examples