---
title: "30 in Roman numerals is XXX"
description: "30 in Roman numerals is XXX, written as 10 + 10 + 10. How it breaks down, how to write it, and the numbers either side."
url: https://atoneplace.net/roman-numerals/30/
site: "At One Place"
---

# 30 in Roman numerals

**30 in Roman numerals: XXX**

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

## How it breaks down

*XXX = 10 + 10 + 10 = 30*

| Group | Value | Subtraction | Running total |
| --- | --- | --- | --- |
| X | 10 | — | 10 |
| X | 10 | — | 20 |
| X | 10 | — | 30 |

## No subtraction needed

XXX 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 — 3× |
| L | 50 | no |
| C | 100 | no |
| D | 500 | no |
| M | 1,000 | no |

## The same number, other ways

- **In words:** Thirty
- **Roman numeral:** XXX
- **Symbol count:** 3 characters
- **Binary:** 11110
- **Hexadecimal:** 1E

## The numbers either side

| Number | Roman numeral |
| --- | --- |
| 28 | XXVIII |
| 29 | XXIX |
| 30 | XXX ← |
| 31 | XXXI |
| 32 | XXXII |

## Common questions

### What is 30 in Roman numerals?

30 is XXX.

### What does XXX mean?

XXX is the Roman numeral for 30 — 10 + 10 + 10.

### How do you write 30 in Roman numerals?

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

## Related pages

- [28 in Roman numerals](https://atoneplace.net/roman-numerals/28/)
- [29 in Roman numerals](https://atoneplace.net/roman-numerals/29/)
- [31 in Roman numerals](https://atoneplace.net/roman-numerals/31/)
- [32 in Roman numerals](https://atoneplace.net/roman-numerals/32/)
- [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/)