The number 13 is written in Roman numerals like this: XIII
XIII = 13
Split the number by place value and write each part in Roman numerals:
Put the parts together: X + III = XIII.
Going the other way? See the Roman numeral XIII.
12 in Roman numerals: XII
14 in Roman numerals: XIV
Calculate the conversion of any number and its equivalent in Roman numerals with our Roman numerals converter.