Number
464 in Roman numerals
464 is written CDLXIV
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 CDLXIV is built
Roman numerals are written one decimal place at a time, largest first.
- CDhundreds · 4C before D means 500 − 100 = 400. This saves writing CCCC.
- LXtens · 6L (50) plus X (10) makes 60.
- IVones · 4I before V means 5 − 1 = 4. This saves writing IIII.
400 + 60 + 4 = 464
The pairs CD and IV use 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 LDXIV. It looks like a shortcut, but L is never written before a larger letter to subtract. The correct form is CDLXIV.
- Not CCCCLXIIII (10 letters). That adds everything up without subtraction. The Romans sometimes wrote numbers this way, and clocks still show 4 as IIII, but today CDLXIV (6 letters) is the standard.
About the number 464
- 464 is even and can be split into prime factors: 2 × 2 × 2 × 2 × 29, or in Roman numerals II × II × II × II × XXIX.
- CDLXIV has 6 letters. 396 of the numbers up to 1,000 have longer numerals.
Counting from 461 to 470
Every number from 461 to 470 starts CDLX (460); only the ending changes.
| Number | Roman numeral |
|---|---|
| 461 | CDLXI |
| 462 | CDLXII |
| 463 | CDLXIII |
| 464 | CDLXIV |
| 465 | CDLXV |
| 466 | CDLXVI |
| 467 | CDLXVII |
| 468 | CDLXVIII |
| 469 | CDLXIX |
| 470 | CDLXX |