29 = XXIX
29 in Roman numerals is XXIX.
Twenty-nine written with the letters X X I X.
29 in words: Twenty-nine
Twenty-nine in Roman numerals is XXIX. You build it as XX (20) + IX (9), writing the larger part first and reading left to right.
Notice the subtractive pair in XXIX: a smaller symbol sits before a larger one to save writing four identical letters in a row. This is the single rule that trips most people up, and once it clicks the rest of the system is straightforward.
How 29 breaks down
Reading XXIX from left to right, each group is added together to reach 29:
| Group | Value | Place |
|---|---|---|
| XX | 20 | tens |
| IX | 9 | ones |
| XXIX | 29 | total |
Frequently asked questions
What is 29 in Roman numerals?
29 in Roman numerals is XXIX.
How do you write 29 in words?
29 is written "Twenty-nine" in English.
What number comes before XXIX?
The number before XXIX is 28, written XXVIII in Roman numerals.
What number comes after XXIX?
The number after XXIX is 30, written XXX in Roman numerals.
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Last updated July 22, 2026. Reviewed for accuracy against the standard rules for Roman numerals.