80 in Roman numerals
LXXX
The number 80 is written LXXX in Roman numerals.
How LXXX breaks down
| Symbols | Value |
|---|---|
L | 50 |
XXX | 3 × 10 = 30 |
LXXX | 80 |
Every symbol here is written in descending order and simply added together — no subtractive pairs are involved.
Nearby numbers
| Number | Roman numeral |
|---|---|
| 75 | LXXV |
| 76 | LXXVI |
| 77 | LXXVII |
| 78 | LXXVIII |
| 79 | LXXIX |
| 80 | LXXX |
| 81 | LXXXI |
| 82 | LXXXII |
| 83 | LXXXIII |
| 84 | LXXXIV |
| 85 | LXXXV |
The seven symbols
I | 1 | C | 100 |
V | 5 | D | 500 |
X | 10 | M | 1,000 |
L | 50 |
80 in other notations
| Roman | LXXX |
| Binary | 1010000 |
| Hexadecimal | 50 |
| Octal | 120 |
| Written out | eighty |
Writing it by hand
Work down through the symbol values, taking as many of each as will fit before moving to the next. For 80:
L = 50 remaining: 30
3 × X = 30 remaining: 0The result reads LXXX — 4 characters, against 2 digits in Arabic numerals.
Frequently asked questions
What is 80 in Roman numerals?
LXXX
How do you read LXXX?
Work left to right, adding each symbol — except where a smaller symbol precedes a larger one, in which case it is subtracted. L is 50, XXX is 30, giving 80 in total.
How do you write 80 in words?
eighty.
Why is there no zero?
Roman numerals have no symbol for zero. The concept reached Europe only with Hindu-Arabic numerals, centuries after the system was in use — which is a large part of why it was eventually replaced for arithmetic.