Number
518 in Roman numerals
518 is written DXVIII
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 DXVIII is built
Roman numerals are written one decimal place at a time, largest first.
- Dhundreds · 5D is 500.
- Xtens · 1X is 10.
- VIIIones · 8V (5) plus III (3) makes 8.
500 + 10 + 8 = 518
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 518
- 518 is even and can be split into prime factors: 2 × 7 × 37, or in Roman numerals II × VII × XXXVII.
- DXVIII has 6 letters. 396 of the numbers up to 1,000 have longer numerals.
Counting from 511 to 520
Every number from 511 to 520 starts DX (510); only the ending changes.
| Number | Roman numeral |
|---|---|
| 511 | DXI |
| 512 | DXII |
| 513 | DXIII |
| 514 | DXIV |
| 515 | DXV |
| 516 | DXVI |
| 517 | DXVII |
| 518 | DXVIII |
| 519 | DXIX |
| 520 | DXX |