How to write 140 in Roman numerals
Roman numerals are built place by place, from the largest value to the smallest. For 140 the places are 100 (hundreds), 40 (tens).
- Write 100 as
C. - Write 40 as
XL.
Joined together, C + XL gives CXL.
140 digit by digit
| Place | Value | Numeral | Rule used |
|---|---|---|---|
| hundreds | 100 | C | one symbol |
| tens | 40 | XL | subtractive: one symbol before the five symbol |
Check CXL by reading it back
Reading CXL from left to right and adding the pieces: C = 100, XL = 40. Together that is 100 + 40 = 140, so CXL and 140 match.
Mistakes to avoid with CXL
- Do not write the 4s and 9s additively. 140 uses subtractive pairs (
XLfor 40), not strings like IIII or VIIII. - Only I, X and C may be placed before a larger symbol to subtract, so CXL never contains forms such as VX or LC.
- Read CXL as one number, not letter by letter: add the values left to right, except where a smaller symbol sits before a larger one.
Facts about the number 140
- 140 is an even number and composite, with prime factors 22 x 5 x 7.
- In binary 140 is
10001100and in hexadecimal it is8C. - Written out, 140 is "one hundred forty".
- The digits of 140 add up to 5.
Where you will see 140 in Roman numerals
People encounter the number 140, written as CXL, in the front matter of lengthy academic books where preliminary pages are numbered with Roman numerals. Publishers use this older system to clearly separate introductory pages from the main text, which uses standard Arabic numbering.
Numbers near 140
| Number | Roman numeral |
|---|---|
| 138 | CXXXVIII |
| 139 | CXXXIX |
| 140 | CXL |
| 141 | CXLI |
| 142 | CXLII |
FAQ
What is 140 in Roman numerals?
140 is written CXL in Roman numerals. It is built from C (100), XL (40).
How do you write 140 in lowercase Roman numerals?
Lowercase Roman numerals use the same rules, so 140 is cxl. Lowercase is common for page numbers in a book's preface and for outline levels.
How do I convert any number to Roman numerals?
Split the number into thousands, hundreds, tens and ones, write each part with the symbols I, V, X, L, C, D and M, then join them from largest to smallest. Or paste it into the Roman numeral converter, which also converts back.
More roman numerals
- 139 (CXXXIX): previous page
- 143 (CXLIII): next page
- Roman numerals chart: the full list