Number
17 in Roman numerals
17 is written XVII
Type any other number or numeral below to convert it.
Above 3,999? Type the barred part in brackets, e.g. (IV)CC = 4,200.
How XVII is built
Roman numerals are written one decimal place at a time, largest first.
- Xtens · 1X is 10.
- VIIones · 7V (5) plus II (2) makes 7.
10 + 7 = 17
No subtraction is needed here: every letter is the same size or smaller than the one before it, so you simply add them up.
About the number 17
- 17 is a prime number: only 1 and 17 divide it exactly.
- XVII has 4 letters. 784 of the numbers up to 1,000 have longer numerals.
- As a day of the month, XVII is the 17th. Write a date
Counting from 11 to 20
| Number | Roman numeral |
|---|---|
| 11 | XI |
| 12 | XII |
| 13 | XIII |
| 14 | XIV |
| 15 | XV |
| 16 | XVI |
| 17 | XVII |
| 18 | XVIII |
| 19 | XIX |
| 20 | XX |