31 in Roman Numerals
Thirty-one is written XXXI in Roman numerals. You read it left to right, adding each glyph in turn: X for 10, X for 10, X for 10, I for 1.
How XXXI is formed
Reading left to right, 31 breaks into these additive parts. Each Roman symbol is added in turn to reach the total.
X + X + X + I = 10 + 10 + 10 + 1 = 31.
Where 31 in Roman numerals is used
- Chapter, act or appendix numbering in books and plays.
- Super Bowl XXXI and other numbered championship events.
- Outlines, exam questions and list items in formal documents.
- Monarch and pope names, for example the 31st of a royal line.
Good to know about 31
- Super Bowl XXXI was played in 1997; the NFL numbers its championship in Roman numerals (with the one-off exception of Super Bowl 50).
Convert another number
31 is written XXXI in Roman numerals.
Frequently asked questions
How do you write 31 in Roman numerals?
Write 31 as XXXI, combining X + X + X + I. Start from the largest value that fits and work down until nothing is left over.
Which Super Bowl is XXXI?
Super Bowl XXXI is the 31st Super Bowl, played in 1997. The NFL sets its championship number in Roman numerals, which is why so many people look up values like XXXI.
What number is XXXI?
XXXI is 31. Read the symbols left to right, treat any smaller-before-larger pair as a single subtraction, and add the groups together.
Is there a shorter way to write 31?
No. XXXI is the standard, canonical spelling. Each value has exactly one correct Roman form, so XXXI is the only valid way to write 31.