The Roman numeral for 31 is XXXI. Break 31 into thousands, hundreds, tens and ones to see why. The converter below turns any number into Roman numerals and back.
31 as a Roman Numeral
Read XXXI from left to right and add the values: XXX (30) + I (1) = 31.
Roman numerals also number book chapters, outlines, and the names of kings and popes.
Free Roman Numeral Converter
How 31 Breaks Down
| Place | Value | Roman |
|---|---|---|
| Tens | 30 | XXX |
| Ones | 1 | I |
| Total | 31 | XXXI |
Write the parts in order from largest to smallest to get XXXI.
The Rules That Make XXXI
| Symbol | I | V | X | L | C | D | M |
|---|---|---|---|---|---|---|---|
| Value | 1 | 5 | 10 | 50 | 100 | 500 | 1000 |
- Add symbols from largest to smallest: VI = 5 + 1.
- Repeat I, X, C or M up to three times: XXX = 30.
- Put a smaller symbol before a larger one to subtract: IV = 4, IX = 9.
XXXI has no subtractive pair, so you only add the symbols from left to right.
31 and the Numbers Around It
| Number | Roman numeral |
|---|---|
| 27 in Roman numerals | XXVII |
| 28 in Roman numerals | XXVIII |
| 29 in Roman numerals | XXIX |
| 30 in Roman numerals | XXX |
| 32 in Roman numerals | XXXII |
| 33 in Roman numerals | XXXIII |
| 34 in Roman numerals | XXXIV |
| 35 in Roman numerals | XXXV |
See the full list in the Roman numerals chart.
FAQs About 31 in Roman Numerals
What is 31 in Roman numerals?
31 in Roman numerals is XXXI.
What is XXXI as a number?
XXXI equals 31.
How do you write 32 in Roman numerals?
32 in Roman numerals is XXXII.
What is 31 times 2 in Roman numerals?
31 x 2 = 62, which is LXII.
The Short Version
31 is XXXI. Split the number into thousands, hundreds, tens and ones, write each part, and join them in order.
