15 in Roman Numerals = XV
15 in Roman numerals is XV. It is ten plus five, two single symbols added left to right.
What is 15 in Roman numerals?
XV is X (10) + V (5), the two base symbols for ten and five sitting side by side.
At two characters it is one of the shortest numerals in the teens, shorter than XIII or XIV and the same length as XI.
How XV is formed
Reading left to right, 15 breaks into these additive parts. Each Roman symbol is added in turn to reach the total.
X + V = 10 + 5 = 15.
Why 15 is written XV
Fifteen is the halfway mark between ten and twenty, and the system marks halfway points with their own symbol at every place value. That is why XV needs no strokes and no subtraction, while its neighbours XIV and XVI both need extra characters.
Where 15 in Roman numerals is used
- Rugby union: A rugby union team fields fifteen players, and a national side is routinely called its country's XV in match reports and on team sheets.
- Regnal names: Louis XV of France reigned from 1715 to 1774, between the two far longer-remembered reigns of Louis XIV and Louis XVI.
- Chapters and outlines: In a Roman-numbered outline, XV is the fifteenth top-level heading, and it is around this point that most style guides suggest switching to Arabic.
- Super Bowl XV: Played in January 1981, won by the Oakland Raiders as a wild-card team.
Common mistakes writing 15 in Roman numerals
- VVV is wrong. V never repeats at all, let alone three times. Two fives are X, and fifteen is X plus a single V.
- XVV is wrong. Same problem in a different position. Once you have written X, the remainder is five, and five is a single V.
Good to know about 15
- Super Bowl XV was played in 1981; the NFL numbers its championship in Roman numerals (with the one-off exception of Super Bowl 50).
Convert another number
15 is written XV in Roman numerals.
Frequently asked questions
How do you write 15 in Roman numerals?
Write 15 as XV, combining X + V. Start from the largest value that fits and work down until nothing is left over.
Which Super Bowl is XV?
Super Bowl XV is the 15th Super Bowl, played in 1981. The NFL sets its championship number in Roman numerals, which is why so many people look up values like XV.
How is XV broken down?
XV breaks down as X (10), V (5), so X + V = 10 + 5 = 15.
What number is XV?
XV is 15. Read the symbols left to right, treat any smaller-before-larger pair as a single subtraction, and add the groups together.
Related conversions
- 150 in Roman numerals is CL, the same digit one place value up.
- 30 in Roman numerals is XXX, double 15.
- 16 in Roman numerals is XVI, one more than 15.
- 14 in Roman numerals is XIV, one less than 15.