1918 in Roman numerals at a glance
- Roman numeral
- MCMXVIII
- Lowercase
- mcmxviii
- Letters
- 8
- Parts
- M · CM · X · V · I · I · I
- Subtractive pairs
- CM
- Read aloud
- nineteen eighteen
- Leap year?
- No
How MCMXVIII is built
Roman numerals are written one decimal place at a time, from the largest place to the smallest. Converting each digit of 1918 separately and joining the pieces gives MCMXVIII:
| Place | Digit | Value | Numeral |
|---|---|---|---|
| Thousands | 1 | 1,000 | M |
| Hundreds | 9 | 900 | CM |
| Tens | 1 | 10 | X |
| Ones | 8 | 8 | VIII |
Reading it back, left to right:
- M = 1,000 → running total 1,000
- CM = 900 (M minus C) → running total 1,900
- X = 10 → running total 1,910
- V = 5 → running total 1,915
- I = 1 → running total 1,916
- I = 1 → running total 1,917
- I = 1 → running total 1,918
Why MCMXVIII has 8 letters
Every year from 1900 to 1999 begins with MCM (1,900); the rest of MCMXVIII after MCM — XVIII — spells out 18. Of the 201 years from 1900 to 2100, 22 have a longer numeral and 147 a shorter one.
The rules MCMXVIII follows
- Largest to smallest. MCMXVIII uses the symbols M, C, X, V and I (8 characters in all), and the values never increase from left to right except inside a subtractive pair.
- Subtraction. CM (900) is a subtractive pair: a smaller symbol in front of a larger one is taken away from it. Only six pairs are allowed — IV, IX, XL, XC, CD and CM — and MCMXVIII uses one of them.
- Repetition. III repeats I three times. I, X, C and M may repeat up to three times in a row; V, L and D never repeat.
Common mistakes when writing 1918
- MDCCCCXVIII — wrong because standard numerals never repeat a symbol four times; 900 is written CM. The correct form is MCMXVIII.
The year 1918 in Roman numerals: where it appears
- Cornerstones and public buildings. Buildings, bridges and monuments from the early 20th century often have their completion year carved as a numeral, so MCMXVIII may be cut into a date stone or lintel from 1918.
- On a calendar. 1918 was not a leap year (365 days), and January 1 fell on a Tuesday. A full date such as July 4, 1918 is often written VII · IV · MCMXVIII.
To turn a complete birth date or wedding date into numerals — with dots, dashes or spaces in US or day-first order — use the Roman numeral date converter.
Years around 1918 in Roman numerals
| Year | Roman numeral | Letters |
|---|---|---|
| 1913 | MCMXIII | 7 |
| 1914 | MCMXIV | 6 |
| 1915 | MCMXV | 5 |
| 1916 | MCMXVI | 6 |
| 1917 | MCMXVII | 7 |
| 1918 | MCMXVIII | 8 |
| 1919 | MCMXIX | 6 |
| 1920 | MCMXX | 5 |
| 1921 | MCMXXI | 6 |
| 1922 | MCMXXII | 7 |
| 1923 | MCMXXIII | 8 |
Frequently asked questions
How do you write 1918 in Roman numerals?
1918 is written MCMXVIII. Break it into M (1000), CM (900), X (10), V (5), I (1), I (1), I (1) and add the parts: 1000 + 900 + 10 + 5 + 1 + 1 + 1 = 1918.
Is MDCCCCXVIII a correct way to write 1918?
No. MDCCCCXVIII is wrong because standard numerals never repeat a symbol four times; 900 is written CM. The standard numeral for 1918 is MCMXVIII.
How do you say MCMXVIII?
Read the value, not the letters: MCMXVIII is the year 1918, said “nineteen eighteen.” Spelling out the letters one by one is only useful when checking a carving or engraving.
What year comes after MCMXVIII?
1919, written MCMXIX. The year before, 1917, is MCMXVII.