---
title: "120 in Roman numerals is CXX"
description: "120 in Roman numerals is CXX, written as 100 + 10 + 10. How it breaks down, how to write it, and the numbers either side."
url: https://atoneplace.net/roman-numerals/120/
site: "At One Place"
---

# 120 in Roman numerals

**120 in Roman numerals: CXX**

120 is written CXX in Roman numerals. That is 3 symbol groups added together, reading left to right from the largest value down.

## How it breaks down

*CXX = 100 + 10 + 10 = 120*

| Group | Value | Subtraction | Running total |
| --- | --- | --- | --- |
| C | 100 | — | 100 |
| X | 10 | — | 110 |
| X | 10 | — | 120 |

## No subtraction needed

CXX is purely additive — every symbol is simply added to the one before it, with no subtractive pairs like IV or IX. Numbers avoid subtraction when none of their digits is a 4 or a 9.

## The symbols

| Symbol | Value | Used here |
| --- | --- | --- |
| I | 1 | no |
| V | 5 | no |
| X | 10 | yes — 2× |
| L | 50 | no |
| C | 100 | yes — 1× |
| D | 500 | no |
| M | 1,000 | no |

## The same number, other ways

- **In words:** One hundred twenty
- **Roman numeral:** CXX
- **Symbol count:** 3 characters
- **Binary:** 1111000
- **Hexadecimal:** 78

## The numbers either side

| Number | Roman numeral |
| --- | --- |
| 118 | CXVIII |
| 119 | CXIX |
| 120 | CXX ← |
| 121 | CXXI |
| 122 | CXXII |

## Common questions

### What is 120 in Roman numerals?

120 is CXX.

### What does CXX mean?

CXX is the Roman numeral for 120 — 100 + 10 + 10.

### How do you write 120 in Roman numerals?

Take the largest value that fits and repeat until nothing is left: C (100), then X (10), then X (10). That gives CXX.

## Related pages

- [118 in Roman numerals](https://atoneplace.net/roman-numerals/118/)
- [119 in Roman numerals](https://atoneplace.net/roman-numerals/119/)
- [121 in Roman numerals](https://atoneplace.net/roman-numerals/121/)
- [122 in Roman numerals](https://atoneplace.net/roman-numerals/122/)
- [4 in Roman numerals](https://atoneplace.net/roman-numerals/4/)
- [9 in Roman numerals](https://atoneplace.net/roman-numerals/9/)
- [14 in Roman numerals](https://atoneplace.net/roman-numerals/14/)
- [19 in Roman numerals](https://atoneplace.net/roman-numerals/19/)
- [40 in Roman numerals](https://atoneplace.net/roman-numerals/40/)
- [42 in Roman numerals](https://atoneplace.net/roman-numerals/42/)
- [49 in Roman numerals](https://atoneplace.net/roman-numerals/49/)
- [50 in Roman numerals](https://atoneplace.net/roman-numerals/50/)

## Sources

- Calculated on this page — At One Place (/about/)