450 in Roman numerals
CDL
The number 450 is written CDL in Roman numerals.
How CDL breaks down
| Symbols | Value |
|---|---|
CD | 400 |
L | 50 |
CDL | 450 |
This numeral uses the subtractive rule: a smaller symbol placed before a larger one is subtracted from it. Only six such pairs are legal — IV (4), IX (9), XL (40), XC (90), CD (400) and CM (900).
Nearby numbers
| Number | Roman numeral |
|---|---|
| 445 | CDXLV |
| 446 | CDXLVI |
| 447 | CDXLVII |
| 448 | CDXLVIII |
| 449 | CDXLIX |
| 450 | CDL |
| 451 | CDLI |
| 452 | CDLII |
| 453 | CDLIII |
| 454 | CDLIV |
| 455 | CDLV |
The seven symbols
I | 1 | C | 100 |
V | 5 | D | 500 |
X | 10 | M | 1,000 |
L | 50 |
450 in other notations
| Roman | CDL |
| Binary | 111000010 |
| Hexadecimal | 1C2 |
| Octal | 702 |
| Written out | four hundred and fifty |
Writing it by hand
Work down through the symbol values, taking as many of each as will fit before moving to the next. For 450:
CD = 400 remaining: 50
L = 50 remaining: 0The result reads CDL — 3 characters, against 3 digits in Arabic numerals.
Frequently asked questions
What is 450 in Roman numerals?
CDL
How do you read CDL?
Work left to right, adding each symbol — except where a smaller symbol precedes a larger one, in which case it is subtracted. CD is 400, L is 50, giving 450 in total.
How do you write 450 in words?
four hundred and fifty.
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.