80 = LXXX
80 in Roman numerals is LXXX.
Eighty written with the letters L X X X.
80 in words: Eighty
Eighty in Roman numerals is LXXX. It is short enough to write from memory once you know the pattern, and it turns up constantly on watch dials, book chapters and film sequels.
Everything in LXXX is additive here, so you simply add each letter's value together. Numbers like this are a good place to get comfortable before tackling the subtractive forms such as IV and IX.
How 80 breaks down
Reading LXXX from left to right, each group is added together to reach 80:
| Group | Value | Place |
|---|---|---|
| LXXX | 80 | tens |
| LXXX | 80 | total |
Frequently asked questions
What is 80 in Roman numerals?
80 in Roman numerals is LXXX.
How do you write 80 in words?
80 is written "Eighty" in English.
What number comes before LXXX?
The number before LXXX is 79, written LXXIX in Roman numerals.
What number comes after LXXX?
The number after LXXX is 81, written LXXXI in Roman numerals.
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Last updated July 22, 2026. Reviewed for accuracy against the standard rules for Roman numerals.