Number
318 in Roman numerals
318 is written CCCXVIII
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 CCCXVIII is built
Roman numerals are written one decimal place at a time, largest first.
- CCChundreds · 3C written 3 times: 3 × 100 = 300.
- Xtens · 1X is 10.
- VIIIones · 8V (5) plus III (3) makes 8.
300 + 10 + 8 = 318
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 318
- 318 is even and can be split into prime factors: 2 × 3 × 53, or in Roman numerals II × III × LIII.
- CCCXVIII has 8 letters. 93 of the numbers up to 1,000 have longer numerals.
Counting from 311 to 320
Every number from 311 to 320 starts CCCX (310); only the ending changes.
| Number | Roman numeral |
|---|---|
| 311 | CCCXI |
| 312 | CCCXII |
| 313 | CCCXIII |
| 314 | CCCXIV |
| 315 | CCCXV |
| 316 | CCCXVI |
| 317 | CCCXVII |
| 318 | CCCXVIII |
| 319 | CCCXIX |
| 320 | CCCXX |