Number
964 in Roman numerals
964 is written CMLXIV
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 CMLXIV is built
Roman numerals are written one decimal place at a time, largest first.
- CMhundreds · 9C before M means 1,000 − 100 = 900. This saves writing DCCCC.
- LXtens · 6L (50) plus X (10) makes 60.
- IVones · 4I before V means 5 − 1 = 4. This saves writing IIII.
900 + 60 + 4 = 964
The pairs CM 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 LMXIV. It looks like a shortcut, but L is never written before a larger letter to subtract. The correct form is CMLXIV.
- Not DCCCCLXIIII (11 letters). That adds everything up without subtraction. The Romans sometimes wrote numbers this way, and clocks still show 4 as IIII, but today CMLXIV (6 letters) is the standard.
About the number 964
- 964 is even and can be split into prime factors: 2 × 2 × 241, or in Roman numerals II × II × CCXLI.
- CMLXIV has 6 letters. 396 of the numbers up to 1,000 have longer numerals.
Counting from 961 to 970
Every number from 961 to 970 starts CMLX (960); only the ending changes.
| Number | Roman numeral |
|---|---|
| 961 | CMLXI |
| 962 | CMLXII |
| 963 | CMLXIII |
| 964 | CMLXIV |
| 965 | CMLXV |
| 966 | CMLXVI |
| 967 | CMLXVII |
| 968 | CMLXVIII |
| 969 | CMLXIX |
| 970 | CMLXX |