Number
240 in Roman numerals
240 is written CCXL
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 CCXL is built
Roman numerals are written one decimal place at a time, largest first.
- CChundreds · 2C written 2 times: 2 × 100 = 200.
- XLtens · 4X before L means 50 − 10 = 40. This saves writing XXXX.
200 + 40 = 240
The pair XL 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 CCXXXX (6 letters). That adds everything up without subtraction. The Romans sometimes wrote numbers this way, and clocks still show 4 as IIII, but today CCXL (4 letters) is the standard.
- There's no letter for zero. The zero is simply left out, which is why 240 has 2 parts, not 3.
About the number 240
- 240 is even and can be split into prime factors: 2 × 2 × 2 × 2 × 3 × 5, or in Roman numerals II × II × II × II × III × V.
- CCXL has 4 letters. 784 of the numbers up to 1,000 have longer numerals.
Counting from 231 to 240
Every number from 231 to 240 starts CCX (210); only the ending changes.
| Number | Roman numeral |
|---|---|
| 231 | CCXXXI |
| 232 | CCXXXII |
| 233 | CCXXXIII |
| 234 | CCXXXIV |
| 235 | CCXXXV |
| 236 | CCXXXVI |
| 237 | CCXXXVII |
| 238 | CCXXXVIII |
| 239 | CCXXXIX |
| 240 | CCXL |