---
title: "80 in Roman numerals is LXXX"
description: "80 in Roman numerals is LXXX, written as 50 + 10 + 10 + 10. How it breaks down, how to write it, and the numbers either side."
url: https://atoneplace.net/roman-numerals/80/
site: "At One Place"
---

# 80 in Roman numerals

**80 in Roman numerals: LXXX**

80 is written LXXX in Roman numerals. That is 4 symbol groups added together, reading left to right from the largest value down.

## How it breaks down

*LXXX = 50 + 10 + 10 + 10 = 80*

| Group | Value | Subtraction | Running total |
| --- | --- | --- | --- |
| L | 50 | — | 50 |
| X | 10 | — | 60 |
| X | 10 | — | 70 |
| X | 10 | — | 80 |

## No subtraction needed

LXXX 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 | yes — 1× |
| C | 100 | no |
| D | 500 | no |
| M | 1,000 | no |

## The same number, other ways

- **In words:** Eighty
- **Roman numeral:** LXXX
- **Symbol count:** 4 characters
- **Binary:** 1010000
- **Hexadecimal:** 50

## The numbers either side

| Number | Roman numeral |
| --- | --- |
| 78 | LXXVIII |
| 79 | LXXIX |
| 80 | LXXX ← |
| 81 | LXXXI |
| 82 | LXXXII |

## Common questions

### What is 80 in Roman numerals?

80 is LXXX.

### What does LXXX mean?

LXXX is the Roman numeral for 80 — 50 + 10 + 10 + 10.

### How do you write 80 in Roman numerals?

Take the largest value that fits and repeat until nothing is left: L (50), then X (10), then X (10), then X (10). That gives LXXX.

## Related pages

- [78 in Roman numerals](https://atoneplace.net/roman-numerals/78/)
- [79 in Roman numerals](https://atoneplace.net/roman-numerals/79/)
- [81 in Roman numerals](https://atoneplace.net/roman-numerals/81/)
- [82 in Roman numerals](https://atoneplace.net/roman-numerals/82/)
- [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/)