31 in Roman Numerals

31 in Roman numerals is XXXI. Read from left to right: X (10) + X (10) + X (10) + I (1) = 31.

How to write 31 in Roman numerals

Break 31 into thousands, hundreds, tens and ones, then write each part with the largest symbols first:

• 30 (tens) = XXX
• 1 (ones) = I

Join them: XXXI.

XXXI only adds symbols from largest to smallest, with no subtraction pairs.

Roman numerals near 31

31 in words

31 is written thirty-one in words (see 31 in words), and इकतीस in Hindi. Its ordinal form is 31st, written thirty-first.

Where you see Roman numerals

Roman numerals still appear on clock faces, in chapter and class numbers, in the names of kings and events, and in exam question numbering. For the full list of symbols and rules, see Roman numerals and the 1 to 100 chart.