30 in Roman numerals
30 in Roman numerals
XXX
30 is written XXX 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 |
| X | 10 | — | 30 |
No subtraction needed
XXX is purely additive — every symbol is simply added to the one before it, with no subtractive pairs like IV or IX. Numbers avoid subtraction when none of their digits is a 4 or a 9.
The symbols
| Symbol | Value | Used here |
|---|---|---|
| I | 1 | no |
| V | 5 | no |
| X | 10 | yes — 3× |
| L | 50 | no |
| C | 100 | no |
| D | 500 | no |
| M | 1,000 | no |
The same number, other ways
- In words
- Thirty
- Roman numeral
- XXX
- Symbol count
- 3 characters
- Binary
- 11110
- Hexadecimal
- 1E
The numbers either side
| Number | Roman numeral |
|---|---|
| 28 | XXVIII |
| 29 | XXIX |
| 30 | XXX ← |
| 31 | XXXI |
| 32 | XXXII |
Common questions
- What is 30 in Roman numerals?
- 30 is XXX.
- What does XXX mean?
- XXX is the Roman numeral for 30 — 10 + 10 + 10.
- How do you write 30 in Roman numerals?
- Take the largest value that fits and repeat until nothing is left: X (10), then X (10), then X (10). That gives XXX.
Related pages
- 28 in Roman numerals XXVIII
- 29 in Roman numerals XXIX
- 31 in Roman numerals XXXI
- 32 in Roman numerals XXXII
- 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