How to write 1990 in Roman numerals
Roman numerals are built place by place, from the largest value to the smallest. For 1990 the places are 1000 (thousands), 900 (hundreds), 90 (tens).
- Write 1000 as
M. - Write 900 as
CM. - Write 90 as
XC.
Joined together, M + CM + XC gives MCMXC.
1990 digit by digit
| Place | Value | Numeral | Rule used |
|---|---|---|---|
| thousands | 1000 | M | one symbol |
| hundreds | 900 | CM | subtractive: one symbol before the ten symbol |
| tens | 90 | XC | subtractive: one symbol before the ten symbol |
Check MCMXC by reading it back
Reading MCMXC from left to right and adding the pieces: M = 1000, CM = 900, XC = 90. Together that is 1000 + 900 + 90 = 1990, so MCMXC and 1990 match.
Mistakes to avoid with MCMXC
- Do not write the 4s and 9s additively. 1990 uses subtractive pairs (
CMfor 900,XCfor 90), not strings like IIII or VIIII. - Only I, X and C may be placed before a larger symbol to subtract, so MCMXC never contains forms such as VX or LC.
- Read MCMXC 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 1990
- 1990 is an even number and composite, with prime factors 2 x 5 x 199.
- In binary 1990 is
11111000110and in hexadecimal it is7C6. - Written out, 1990 is "one thousand nine hundred ninety".
- The digits of 1990 add up to 19.
- As a year, 1990 was a common year with 365 days and belongs to the 20th century.
Where you will see 1990 in Roman numerals
Video games from the early console era occasionally display the number 1990 as MCMXC on their title screens. Game developers borrowed the film industry habit of using Roman numerals for copyright years to make their software look more professional and polished.
Numbers near 1990
FAQ
What is 1990 in Roman numerals?
1990 is written MCMXC in Roman numerals. It is built from M (1000), CM (900), XC (90).
How do you write 1990 in lowercase Roman numerals?
Lowercase Roman numerals use the same rules, so 1990 is mcmxc. 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
- 1989 (MCMLXXXIX): previous page
- 1991 (MCMXCI): next page
- Roman numerals chart: the full list