Number
80 in Roman numerals
80 is written LXXX
Type any other number or numeral below to convert it.
Above 3,999? Type the barred part in brackets, e.g. (IV)CC = 4,200.
How LXXX is built
Roman numerals are written one decimal place at a time, largest first.
- LXXXtens · 8L (50) plus XXX (30) makes 80.
Mistakes to avoid
- There's no letter for zero. The zero is simply left out, which is why 80 has 1 part, not 2.
About the number 80
- 80 is even and can be split into prime factors: 2 × 2 × 2 × 2 × 5, or in Roman numerals II × II × II × II × V.
- LXXX has 4 letters. 784 of the numbers up to 1,000 have longer numerals.
Counting from 71 to 80
Every number from 71 to 80 starts LXX (70); only the ending changes.
| Number | Roman numeral |
|---|---|
| 71 | LXXI |
| 72 | LXXII |
| 73 | LXXIII |
| 74 | LXXIV |
| 75 | LXXV |
| 76 | LXXVI |
| 77 | LXXVII |
| 78 | LXXVIII |
| 79 | LXXIX |
| 80 | LXXX |