24 in Roman numerals
24 in Roman numerals
XXIV
24 is written XXIV in Roman numerals. That is 3 symbol groups added together, reading left to right from the largest value down.
How it breaks down
| Group | Value | Subtraction | Running total |
|---|---|---|---|
| X | 10 | — | 10 |
| X | 10 | — | 20 |
| IV | 4 | V − I | 24 |
Why the smaller symbol comes first
XXIV uses subtractive notation in one place: IV means V minus I, or 4. A smaller symbol placed before a larger one is subtracted from it rather than added, which is why IX is nine and not eleven.
Only six such pairs are valid — IV, IX, XL, XC, CD and CM. That restriction is what makes the notation unambiguous: IIII and IC both look like they should work, but neither is standard, and only one spelling of any number is correct.
The symbols
| Symbol | Value | Used here |
|---|---|---|
| I | 1 | yes — 1× |
| V | 5 | yes — 1× |
| X | 10 | yes — 2× |
| L | 50 | no |
| C | 100 | no |
| D | 500 | no |
| M | 1,000 | no |
The same number, other ways
- In words
- Twenty-four
- Roman numeral
- XXIV
- Symbol count
- 4 characters
- Binary
- 11000
- Hexadecimal
- 18
The numbers either side
| Number | Roman numeral |
|---|---|
| 22 | XXII |
| 23 | XXIII |
| 24 | XXIV ← |
| 25 | XXV |
| 26 | XXVI |
Common questions
- What is 24 in Roman numerals?
- 24 is XXIV.
- What does XXIV mean?
- XXIV is the Roman numeral for 24 — 10 + 10 + 4.
- How do you write 24 in Roman numerals?
- Take the largest value that fits and repeat until nothing is left: X (10), then X (10), then IV (4). That gives XXIV.
Related pages
- 22 in Roman numerals XXII
- 23 in Roman numerals XXIII
- 25 in Roman numerals XXV
- 26 in Roman numerals XXVI
- 4 in Roman numerals IV
- 9 in Roman numerals IX
- 14 in Roman numerals XIV
- 19 in Roman numerals XIX
- 40 in Roman numerals XL
- 42 in Roman numerals XLII
- 49 in Roman numerals XLIX
- 50 in Roman numerals L
Sources
- Calculated on this page — At One Place