X in numbers
X = 10.
Ten written as a Roman numeral.
10 in words: Ten
Ten, often explained as two V shapes joined at their points, or as a crossed tally. It is the hinge of the tens place.
Put plainly, the numeral X in numbers is 10 ("Ten"). Type it into the converter above and it reads straight back, which is the fastest way to check a numeral you have found on a clock face, a cornerstone, a film credit or a tattoo before you trust it.
How to read X
Roman numerals are read left to right, largest value first, adding as you go. Scanning X one group at a time gives a running total that lands on 10:
| Read | Worth | Running total |
|---|---|---|
| X | 10 | 10 |
There is no subtraction anywhere in X, so every letter simply adds to the total. Numerals like this are the easiest to read: no letter changes the meaning of the one next to it.
Where you will see X
Counted in order, X is the tenth number. Read as a year, 10 falls in the 1st century AD. The next round anchor above it is C (100), a useful landmark when you are reading numerals this small.
Numerals up to a hundred like X are the ones you meet most: clock hours, chapter numbers, sequels and anniversaries all live in this range, so learning to read X on sight pays off more often than any larger numeral would.
- Clock faces: On a clock or watch dial that uses Roman numerals, X marks the 10th hour.
- Centuries: Style guides write the 10th century as the X century, using the numeral in place of the figure.
- Sequels and series: A tenth film or game in a series is often numbered X rather than 10, a long-running billing convention.
- Monarchs and popes: A monarch or pope who is the tenth of their name takes X after it, as in the regnal style "Name X".
Frequently asked questions
What does X mean in Roman numerals?
X means 10 in Roman numerals, which is "ten" in words.
What is X in numbers?
X in numbers is 10. Read the letters from the largest value down and add each group together.
Is X a valid Roman numeral?
Yes. X follows the standard rules and is the correct way to write 10.
Where is X used?
On a clock or watch dial that uses Roman numerals, X marks the 10th hour. Style guides write the 10th century as the X century, using the numeral in place of the figure.
What century does the year 10 fall in?
The year 10, written X, falls in the 1st century AD.
Nearby numerals
Last updated July 22, 2026. Reviewed for accuracy against the standard rules for Roman numerals.