100 in Roman numerals at a glance
- Roman numeral
- C
- Lowercase
- c
- Letters
- 1
- Parts
- C
- Subtractive pairs
- None
- In words
- one hundred
- Latin name
- centum
How C is built
Roman numerals are written one decimal place at a time, from the largest place to the smallest. Converting each digit of 100 separately and joining the pieces gives C:
| Place | Digit | Value | Numeral |
|---|---|---|---|
| Hundreds | 1 | 100 | C |
| Tens | 0 | 0 | — (zero has no symbol) |
| Ones | 0 | 0 | — (zero has no symbol) |
Reading it back, left to right:
- C = 100 → running total 100
The rules C follows
- Largest to smallest. C uses only the symbol C (1 character in all), and the values never increase from left to right except inside a subtractive pair.
- No subtraction needed. None of the digits of 100 is a 4 or a 9, so C is purely additive: just add the symbol values.
- No repeats. Every symbol in C appears once in a row, which is why the numeral stays short.
Where you will see C
- Championship games. Pro football numbers its championship game with Roman numerals, starting from game I in January 1967. Game C falls in early 2066.
- A single character. Unicode has a dedicated symbol for C: Ⅽ (U+216D), mainly so East Asian text can set the numeral in one character cell. For ordinary writing, use the plain letters.
- Volumes and sequels. Book volumes, conference editions, film sequels and anniversary events often carry a Roman numeral; edition C would be the 100th.
Numbers near 100 in Roman numerals
Frequently asked questions
How do you write 100 in Roman numerals?
100 is written C. It is a single symbol worth 100.
What is 100 in Latin?
The Latin cardinal number 100 is “centum.” The Romans wrote it as C.
What is C plus one?
C + I = CI (101). Adding one can change the whole ending of a numeral, which is why it helps to convert to digits, add, and convert back.