Number
19 in Roman numerals
19 is written XIX
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 XIX is built
Roman numerals are written one decimal place at a time, largest first.
- Xtens · 1X is 10.
- IXones · 9I before X means 10 − 1 = 9. This saves writing VIIII.
10 + 9 = 19
The pair IX uses subtraction: a smaller letter before a larger one is taken away from it. Only six pairs work this way: IV, IX, XL, XC, CD and CM. More on subtraction
Mistakes to avoid
- Not XVIIII (6 letters). That adds everything up without subtraction. The Romans sometimes wrote numbers this way, and clocks still show 4 as IIII, but today XIX (3 letters) is the standard.
About the number 19
- 19 is a prime number: only 1 and 19 divide it exactly.
- XIX has 3 letters. 907 of the numbers up to 1,000 have longer numerals.
- As a day of the month, XIX is the 19th. 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 |