11 in Roman Numerals
11 is written as XI in Roman numerals.
How XI is built
Roman numerals are written one place value at a time, largest first. 11 splits into 10 (tens) + 1 (ones), and each piece becomes its own group of symbols:
| Symbol | Value | Running total | Note |
|---|---|---|---|
| X | 10 | 10 | |
| I | 1 | 11 |
Read left to right, the symbols add up: 10 + 1 = 11. XI needs no subtractive pairs: every symbol in it is simply added, because no place value of 11 is a 4 or a 9.
The symbol X (10) is the largest one used to build XI -- it also shows up in 81 other numbers between 1 and 100.
Frequently Asked Questions
What is 11 in Roman numerals?
11 in Roman numerals is XI. It is built from 2 symbol groups: X (10), I (1).
How do you write XI as a number?
Add the symbol values left to right, subtracting whenever a smaller symbol sits before a larger one: 10 + 1 = 11.
Does XI use subtractive notation?
No. None of the place values of 11 is a 4 or a 9, so every symbol in XI is simply added.
What comes before and after 11 in Roman numerals?
10 is X and 12 is XII. Counting up in Roman numerals changes only the lowest place until it rolls over, the same way decimal digits do.
How long is XI compared to other numbers near 11?
XI is 2 characters long. Roman numerals don't get longer in a straight line with the number they represent -- X (10) is 1 character and XII (12) is 3 characters, because each number is rebuilt from scratch out of the largest symbols that fit, not incremented digit by digit.
More Number Conversions
- Roman Numeral Converter (convert any number)
- Factors of 11
Nearby numbers
9 is IX, 10 is X, 12 is XII, 13 is XIII.
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