320 in Roman numerals
CCCXX
The number 320 is written CCCXX in Roman numerals.
How CCCXX breaks down
| Symbols | Value |
|---|---|
CCC | 3 × 100 = 300 |
XX | 2 × 10 = 20 |
CCCXX | 320 |
Every symbol here is written in descending order and simply added together — no subtractive pairs are involved.
Nearby numbers
| Number | Roman numeral |
|---|---|
| 315 | CCCXV |
| 316 | CCCXVI |
| 317 | CCCXVII |
| 318 | CCCXVIII |
| 319 | CCCXIX |
| 320 | CCCXX |
| 321 | CCCXXI |
| 322 | CCCXXII |
| 323 | CCCXXIII |
| 324 | CCCXXIV |
| 325 | CCCXXV |
The seven symbols
I | 1 | C | 100 |
V | 5 | D | 500 |
X | 10 | M | 1,000 |
L | 50 |
320 in other notations
| Roman | CCCXX |
| Binary | 101000000 |
| Hexadecimal | 140 |
| Octal | 500 |
| Written out | three hundred and twenty |
Writing it by hand
Work down through the symbol values, taking as many of each as will fit before moving to the next. For 320:
3 × C = 300 remaining: 20
2 × X = 20 remaining: 0The result reads CCCXX — 5 characters, against 3 digits in Arabic numerals.
Frequently asked questions
What is 320 in Roman numerals?
CCCXX
How do you read CCCXX?
Work left to right, adding each symbol — except where a smaller symbol precedes a larger one, in which case it is subtracted. CCC is 300, XX is 20, giving 320 in total.
How do you write 320 in words?
three hundred and twenty.
Why is there no zero?
Roman numerals have no symbol for zero. The concept reached Europe only with Hindu-Arabic numerals, centuries after the system was in use — which is a large part of why it was eventually replaced for arithmetic.