18 in Roman numerals is XVIII. Read from left to right: X (10) + V (5) + I (1) + I (1) + I (1) = 18.
How to write 18 in Roman numerals
Break 18 into thousands, hundreds, tens and ones, then write each part with the largest symbols first:
- 10 (tens) = X
- 8 (ones) = VIII
Join them: XVIII.
XVIII only adds symbols from largest to smallest, with no subtraction pairs.
Roman numerals near 18
18 in words
18 is written eighteen in words (see 18 in words), and अठारह in Hindi. Its ordinal form is 18th, written eighteenth.
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.
Questions people ask
What is 18 in Roman numerals?
18 in Roman numerals is XVIII.
What number is XVIII?
XVIII is 18: 10 + 5 + 1 + 1 + 1 = 18.
How do you write 18 in Roman numbers?
Write each place value with its symbols and join them: X V I I I gives XVIII.
What is 180 in Roman numerals?
180 is CLXXX.