CXX in numbers
CXX = 120.
One hundred twenty written as a Roman numeral.
120 in words: One hundred twenty
CXX is 120, "one hundred twenty". It is built from C (100) and XX (20), read from the largest value down and added together. Every symbol here is added in sequence, with no subtraction involved.
Put plainly, the numeral CXX in numbers is 120 ("One hundred twenty"). 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 CXX is built
| Group | Value |
|---|---|
| C | 100 |
| XX | 20 |
| CXX | 120 |
How to read CXX
Roman numerals are read left to right, largest value first, adding as you go. Scanning CXX one group at a time gives a running total that lands on 120:
| Read | Worth | Running total |
|---|---|---|
| C | 100 | 100 |
| XX | 20 | 120 |
There is no subtraction anywhere in CXX, 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 CXX
Counted in order, CXX is the one hundred twentieth number. Read as a year, 120 falls in the 2nd century AD. It sits between the round anchors C (100) and CC (200), which is the quickest way to place a numeral of this size at a glance.
Past a hundred, a numeral like CXX shows up mainly in dates, formal enumeration and anywhere a large figure is written out in full. You read it exactly as you read the small ones, by taking each group from the largest value down, "one hundred twenty".
- Chapters and sections: Long documents number their parts in Roman numerals: legal codes, multi-volume sets and numbered sections all reach values like CXX, part 120.
- Dates and credits: Whenever a year or a copyright line is set in Roman numerals, values like CXX appear in full, which is where longer numerals are most commonly seen.
Frequently asked questions
What does CXX mean in Roman numerals?
CXX means 120 in Roman numerals, which is "one hundred twenty" in words.
What is CXX in numbers?
CXX in numbers is 120. Read the letters from the largest value down and add each group together.
Is CXX a valid Roman numeral?
Yes. CXX follows the standard rules and is the correct way to write 120.
Where is CXX used?
Long documents number their parts in Roman numerals: legal codes, multi-volume sets and numbered sections all reach values like CXX, part 120. Whenever a year or a copyright line is set in Roman numerals, values like CXX appear in full, which is where longer numerals are most commonly seen.
What century does the year 120 fall in?
The year 120, written CXX, falls in the 2nd century AD.
Nearby numerals
Last updated July 22, 2026. Reviewed for accuracy against the standard rules for Roman numerals.