How to write 87 in Roman numerals
Roman numerals are built place by place, from the largest value to the smallest. For 87 the places are 80 (tens), 7 (ones).
- Write 80 as
LXXX. - Write 7 as
VII.
Joined together, LXXX + VII gives LXXXVII.
87 digit by digit
| Place | Value | Numeral | Rule used |
|---|---|---|---|
| tens | 80 | LXXX | the five symbol plus three |
| ones | 7 | VII | the five symbol plus two |
Check LXXXVII by reading it back
Reading LXXXVII from left to right and adding the pieces: LXXX = 80, VII = 7. Together that is 80 + 7 = 87, so LXXXVII and 87 match.
Mistakes to avoid with LXXXVII
- Never repeat a symbol more than three times in a row. When a fourth would be needed, the subtractive form takes over.
- Only I, X and C may be placed before a larger symbol to subtract, so LXXXVII never contains forms such as VX or LC.
- Read LXXXVII 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 87
- 87 is an odd number and composite, with prime factors 3 x 29.
- In binary 87 is
1010111and in hexadecimal it is57. - Written out, 87 is "eighty-seven".
- The digits of 87 add up to 15, so it is divisible by 3.
Where you will see 87 in Roman numerals
Researchers see the number 87 formatted as LXXXVII when navigating deeply nested outlines in scientific dissertations. Universities require Roman numerals for primary outline levels to enforce a standardized, universally understood structure across academic departments.
Numbers near 87
FAQ
What is 87 in Roman numerals?
87 is written LXXXVII in Roman numerals. It is built from LXXX (80), VII (7).
How do you write 87 in lowercase Roman numerals?
Lowercase Roman numerals use the same rules, so 87 is lxxxvii. 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
- 86 (LXXXVI): previous page
- 88 (LXXXVIII): next page
- Roman numerals chart: the full list