XXIX in numbers
XXIX = 29.
Twenty-nine written as a Roman numeral.
29 in words: Twenty-nine
XXIX is 29, "twenty-nine". It is built from XX (20) and IX (9), read from the largest value down and added together. It uses the subtractive form IX, where a smaller symbol placed before a larger one means one less.
Put plainly, the numeral XXIX in numbers is 29 ("Twenty-nine"). Type it into the converter above and it reads straight back, which is the fastest way to check a numeral you have found on a clock face, a cornerstone, a film credit or a tattoo before you trust it.
How XXIX is built
| Group | Value |
|---|---|
| XX | 20 |
| IX | 9 |
| XXIX | 29 |
How to read XXIX
Roman numerals are read left to right, largest value first, adding as you go. Scanning XXIX one group at a time gives a running total that lands on 29:
| Read | Worth | Running total |
|---|---|---|
| XX | 20 | 20 |
| IX | 9 | 29 |
The one place that scan can trip you up is the pair IX. A smaller letter sitting in front of a larger one is subtracted, not added, so you have to read those two letters as a single unit rather than one at a time. Treat IX as one group and the rest of XXIX falls into place.
Where you will see XXIX
Counted in order, XXIX is the twenty-ninth number. Read as a year, 29 falls in the 1st century AD. The next round anchor above it is C (100), a useful landmark when you are reading numerals this small.
Numerals up to a hundred like XXIX are the ones you meet most: clock hours, chapter numbers, sequels and anniversaries all live in this range, so learning to read XXIX on sight pays off more often than any larger numeral would.
- Super Bowls: The NFL numbers its championship games in Roman numerals, which makes game 29 Super Bowl XXIX.
- Olympiads: The modern Olympic Games are counted as Olympiads in Roman numerals, so the twenty-ninth is the XXIX Olympiad.
- Chapters and sections: Book front matter, multi-volume sets and legal sections often number parts in Roman numerals, where XXIX is part 29.
- Dates and credits: Whenever a year or a copyright line is set in Roman numerals, values like XXIX appear in full, which is where longer numerals are most commonly seen.
Frequently asked questions
What does XXIX mean in Roman numerals?
XXIX means 29 in Roman numerals, which is "twenty-nine" in words.
What is XXIX in numbers?
XXIX in numbers is 29. Read the letters from the largest value down and add each group together.
Is XXIX a valid Roman numeral?
Yes. XXIX follows the standard rules and is the correct way to write 29.
Where is XXIX used?
The NFL numbers its championship games in Roman numerals, which makes game 29 Super Bowl XXIX. The modern Olympic Games are counted as Olympiads in Roman numerals, so the twenty-ninth is the XXIX Olympiad.
What century does the year 29 fall in?
The year 29, written XXIX, falls in the 1st century AD.
Nearby numerals
Last updated July 22, 2026. Reviewed for accuracy against the standard rules for Roman numerals.