11 in Roman Numerals
Eleven is written XI in Roman numerals. You read it left to right, adding each glyph in turn: X for 10, I for 1.
How XI is formed
Reading left to right, 11 breaks into these additive parts. Each Roman symbol is added in turn to reach the total.
X + I = 10 + 1 = 11.
Where 11 in Roman numerals is used
- Hour 11 on a clock or watch face, shown as XI.
- Chapter, act or appendix numbering in books and plays.
- Super Bowl XI and other numbered championship events.
- Outlines, exam questions and list items in formal documents.
Good to know about 11
- On a clock or watch face, 11 o'clock is shown as XI.
- Super Bowl XI was played in 1977; the NFL numbers its championship in Roman numerals (with the one-off exception of Super Bowl 50).
- 11 is a repdigit, the same digit repeated, which makes XI a tidy example of how each place value is written in turn.
Convert another number
11 is written XI in Roman numerals.
Frequently asked questions
How do you write 11 in Roman numerals?
Write 11 as XI, combining X + I. Start from the largest value that fits and work down until nothing is left over.
Is XI the 11 you see on a clock?
Yes. 11 o'clock is written XI on Roman-numeral clock and watch faces, with the one quirk that many dials print four as IIII rather than IV out of tradition.
Which Super Bowl is XI?
Super Bowl XI is the 11th Super Bowl, played in 1977. The NFL sets its championship number in Roman numerals, which is why so many people look up values like XI.
What number is XI?
XI is 11. Read the symbols left to right, treat any smaller-before-larger pair as a single subtraction, and add the groups together.