29 in Roman numerals
29 in Roman numerals
XXIX
29 is written XXIX 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 |
| IX | 9 | X − I | 29 |
Why the smaller symbol comes first
XXIX uses subtractive notation in one place: IX means X minus I, or 9. 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 | 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
- Twenty-nine
- Roman numeral
- XXIX
- Symbol count
- 4 characters
- Binary
- 11101
- Hexadecimal
- 1D
The numbers either side
| Number | Roman numeral |
|---|---|
| 27 | XXVII |
| 28 | XXVIII |
| 29 | XXIX ← |
| 30 | XXX |
| 31 | XXXI |
Common questions
- What is 29 in Roman numerals?
- 29 is XXIX.
- What does XXIX mean?
- XXIX is the Roman numeral for 29 — 10 + 10 + 9.
- How do you write 29 in Roman numerals?
- Take the largest value that fits and repeat until nothing is left: X (10), then X (10), then IX (9). That gives XXIX.
Related pages
- 27 in Roman numerals XXVII
- 28 in Roman numerals XXVIII
- 30 in Roman numerals XXX
- 31 in Roman numerals XXXI
- 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