Number
140 in Roman numerals
140 is written CXL
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 CXL is built
Roman numerals are written one decimal place at a time, largest first.
- Chundreds · 1C is 100.
- XLtens · 4X before L means 50 − 10 = 40. This saves writing XXXX.
100 + 40 = 140
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 CXXXX (5 letters). That adds everything up without subtraction. The Romans sometimes wrote numbers this way, and clocks still show 4 as IIII, but today CXL (3 letters) is the standard.
- There's no letter for zero. The zero is simply left out, which is why 140 has 2 parts, not 3.
About the number 140
- 140 is even and can be split into prime factors: 2 × 2 × 5 × 7, or in Roman numerals II × II × V × VII.
- CXL has 3 letters. 907 of the numbers up to 1,000 have longer numerals.
Counting from 131 to 140
Every number from 131 to 140 starts CX (110); only the ending changes.
| Number | Roman numeral |
|---|---|
| 131 | CXXXI |
| 132 | CXXXII |
| 133 | CXXXIII |
| 134 | CXXXIV |
| 135 | CXXXV |
| 136 | CXXXVI |
| 137 | CXXXVII |
| 138 | CXXXVIII |
| 139 | CXXXIX |
| 140 | CXL |