13 in Roman Numerals
Thirteen is written XIII in Roman numerals. You read it left to right, adding each glyph in turn: X for 10, I for 1, I for 1, I for 1.
How XIII is formed
Reading left to right, 13 breaks into these additive parts. Each Roman symbol is added in turn to reach the total.
X + I + I + I = 10 + 1 + 1 + 1 = 13.
Where 13 in Roman numerals is used
- Chapter, act or appendix numbering in books and plays.
- Super Bowl XIII and other numbered championship events.
- Outlines, exam questions and list items in formal documents.
- Monarch and pope names, for example the 13th of a royal line.
Good to know about 13
- Thirteen, XIII, carries superstition in much of the West and turns up on buildings that skip a thirteenth floor.
Convert another number
13 is written XIII in Roman numerals.
Frequently asked questions
How do you write 13 in Roman numerals?
Write 13 as XIII, combining X + I + I + I. Start from the largest value that fits and work down until nothing is left over.
Which Super Bowl is XIII?
Super Bowl XIII is the 13th Super Bowl, played in 1979. The NFL sets its championship number in Roman numerals, which is why so many people look up values like XIII.
How do you say XIII in words?
XIII is 13, spoken as "thirteen". The numeral is read as the single value 13, not as its separate letters.
What are 12 and 14 in Roman numerals?
12 is XII and 14 is XIV. Neighbouring numbers often change length in surprising ways, which is why each has its own page.