18 in Roman Numerals

Roman numeral
18 = XVIII
10 + 5 + 1 + 1 + 1 = X + V + I + I + I
The number 18 is written as XVIII in Roman numerals, formed by adding X + V + I + I + I (10 + 5 + 1 + 1 + 1).
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Nearby numbers

NumberRoman numeral
10X
16XVI
17XVII
18XVIII
19XIX
20XX
50L
100C
500D
1000M

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Frequently asked questions

What is 18 in Roman numerals?+

18 in Roman numerals is XVIII.

How is 18 written in Roman numerals?+

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