---
title: "23 in Roman numerals is XXIII"
description: "23 in Roman numerals is XXIII, written as 10 + 10 + 1 + 1 + 1. How it breaks down, how to write it, and the numbers either side."
url: https://atoneplace.net/roman-numerals/23/
site: "At One Place"
---

# 23 in Roman numerals

**23 in Roman numerals: XXIII**

23 is written XXIII in Roman numerals. That is 5 symbol groups added together, reading left to right from the largest value down.

## How it breaks down

*XXIII = 10 + 10 + 1 + 1 + 1 = 23*

| Group | Value | Subtraction | Running total |
| --- | --- | --- | --- |
| X | 10 | — | 10 |
| X | 10 | — | 20 |
| I | 1 | — | 21 |
| I | 1 | — | 22 |
| I | 1 | — | 23 |

## No subtraction needed

XXIII 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 | yes — 3× |
| V | 5 | no |
| X | 10 | yes — 2× |
| L | 50 | no |
| C | 100 | no |
| D | 500 | no |
| M | 1,000 | no |

## The same number, other ways

- **In words:** Twenty-three
- **Roman numeral:** XXIII
- **Symbol count:** 5 characters
- **Binary:** 10111
- **Hexadecimal:** 17

## The numbers either side

| Number | Roman numeral |
| --- | --- |
| 21 | XXI |
| 22 | XXII |
| 23 | XXIII ← |
| 24 | XXIV |
| 25 | XXV |

## Common questions

### What is 23 in Roman numerals?

23 is XXIII.

### What does XXIII mean?

XXIII is the Roman numeral for 23 — 10 + 10 + 1 + 1 + 1.

### How do you write 23 in Roman numerals?

Take the largest value that fits and repeat until nothing is left: X (10), then X (10), then I (1), then I (1), then I (1). That gives XXIII.

## Related pages

- [21 in Roman numerals](https://atoneplace.net/roman-numerals/21/)
- [22 in Roman numerals](https://atoneplace.net/roman-numerals/22/)
- [24 in Roman numerals](https://atoneplace.net/roman-numerals/24/)
- [25 in Roman numerals](https://atoneplace.net/roman-numerals/25/)
- [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/)