X is a single Roman symbol group for 10.
How 10 is written in Roman numerals
The number 10 is written X in Roman numerals. Roman numerals use seven letters — I (1), V (5), X (10), L (50), C (100), D (500) and M (1000) — combined from largest to smallest, with subtractive pairs such as IV (4) and IX (9). Need another number? Use the Roman numeral converter or see the 1–100 chart.
Building X step by step — take the largest value that fits, write its symbol, subtract, repeat.
| Write | Value | Remaining before | Remaining after |
|---|
| X | 10 | 10 | 0 |
Where you see X
On a clock face, the 10th hour is marked X. Regnal and papal names use it the same way — a 10th ruler of a name is styled X, as in Louis X or Pope John X. The 10th Super Bowl was Super Bowl X; the NFL has used Roman numerals for every edition except Super Bowl 50.
Nearby numbers
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Frequently Asked Questions
What is 10 in Roman numerals?
10 in Roman numerals is X. It is written as one value group, X, worth 10 on its own, so nothing has to be added to it. The number below it, 9, is written IX, and the number above it, 11, is written XI.
How do you write 10 in Roman numerals?
Write 10 as X, a single Roman symbol group worth 10. Roman numerals are built by taking the largest value that still fits, writing its symbol and subtracting it, which reduces 10 in 1 step: X leaves 0. Every symbol keeps the same value wherever it stands, so the order is fixed and X is the only standard spelling of 10.
What are the Roman numerals either side of 10?
Either side of 10 the Roman numerals are IX for 9 and XI for 11, with X between them. Those three numerals are 2, 1 and 2 letters long, so the length changes as you count. Roman numerals have no digit positions, so each step can rewrite the numeral rather than bumping a single digit.
How is X read out loud?
X is read as the number it stands for, ten, and never letter by letter. Roman numerals are a way of writing values rather than a separate set of names, so the spoken form is the same whether the page shows 10 or X. A chapter or volume numbered X, for instance, is simply chapter ten.