80 in Roman Numerals
80 is written as LXXX in Roman numerals.
How LXXX is built
Roman numerals are written one place value at a time, largest first. 80 splits into 80 (tens), and each piece becomes its own group of symbols:
| Symbol | Value | Running total | Note |
|---|---|---|---|
| L | 50 | 50 | |
| X | 10 | 60 | |
| X | 10 | 70 | |
| X | 10 | 80 |
Read left to right, the symbols add up: 50 + 10 + 10 + 10 = 80. LXXX needs no subtractive pairs: every symbol in it is simply added, because no place value of 80 is a 4 or a 9.
The symbol L (50) is the largest one used to build LXXX -- it also shows up in 49 other numbers between 1 and 100.
Frequently Asked Questions
What is 80 in Roman numerals?
80 in Roman numerals is LXXX. It is built from 4 symbol groups: L (50), X (10), X (10), X (10).
How do you write LXXX as a number?
Add the symbol values left to right, subtracting whenever a smaller symbol sits before a larger one: 50 + 10 + 10 + 10 = 80.
Does LXXX use subtractive notation?
No. None of the place values of 80 is a 4 or a 9, so every symbol in LXXX is simply added.
What comes before and after 80 in Roman numerals?
79 is LXXIX and 81 is LXXXI. Counting up in Roman numerals changes only the lowest place until it rolls over, the same way decimal digits do.
How long is LXXX compared to other numbers near 80?
LXXX is 4 characters long. Roman numerals don't get longer in a straight line with the number they represent -- LXXIX (79) is 5 characters and LXXXI (81) is 5 characters, because each number is rebuilt from scratch out of the largest symbols that fit, not incremented digit by digit.
More Number Conversions
- Roman Numeral Converter (convert any number)
- Factors of 80
Nearby numbers
78 is LXXVIII, 79 is LXXIX, 81 is LXXXI, 82 is LXXXII.
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