18 in Roman Numerals

The number 18 is written XVIII in Roman numerals. Reading left to right and adding the values gives 10 + 5 + 1 + 1 + 1 = 18. Roman numerals use seven letters — I (1), V (5), X (10), L (50), C (100), D (500) and M (1000) — with a smaller letter before a larger one meaning subtraction (IV = 4, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900).

Nearby & popular values

Frequently asked

What is 18 in Roman numerals?

18 in Roman numerals is XVIII.

How is 18 written in Roman numerals?

18 is written XVIII, which breaks down as 10 + 5 + 1 + 1 + 1 = 18.

Is there a Roman numeral for zero?

No. The Roman system has no symbol for zero, which is one reason it was eventually replaced for calculation.