How do you write 13 in Roman numerals?

Answer XIII

13 = 10 (X) + 3 (III)

Number13
Roman numeralXIII
Breakdown10 (X) + 3 (III)
Letters4

To write 13 in Roman numerals, split it into thousands, hundreds, tens and units and write each part: 10 (X) + 3 (III). Put together, that gives XIII.

Roman numerals use seven letters: I = 1, V = 5, X = 10, L = 50, C = 100, D = 500 and M = 1000. A smaller letter in front of a larger one is subtracted (IV = 4, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900); otherwise the values are added.

Nearby numbers in Roman numerals

NumberRoman numeral
7VII
8VIII
9IX
10X
11XI
12XII
14XIV
15XV
16XVI
17XVII
18XVIII
19XIX

Try another value

Frequently asked questions

What is 13 in Roman numerals?

13 is written as XIII.

How is XIII built?

XIII = 10 (X) + 3 (III).

What is the largest Roman numeral?

With standard letters the largest number is 3999, written MMMCMXCIX.