18 in Roman numerals
18 in Roman numerals is XVIII.
18 in Roman numerals
Pick any whole number from 1 to 3,999.
How to work it out
- 1
Take the biggest Roman value that fits, write its letter, subtract it, and repeat.
- 2
Here: 10 (X) + 5 (V) + 1 (I) + 1 (I) + 1 (I) = 18.
- 3
Joined together: XVIII. (Four of the same letter in a row is never used: 4 is IV, 9 is IX, 40 is XL, 90 is XC, 400 is CD, 900 is CM.)
Building 18
| Value | Letters |
|---|---|
| 10 | X |
| 5 | V |
| 1 | I |
| 1 | I |
| 1 | I |
Questions
What is 18 in Roman numerals?
XVIII.
How do you read XVIII?
XVIII = 10 + 5 + 1 + 1 + 1 = 18.