Number
84 in Roman numerals
84 is written LXXXIV
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 LXXXIV is built
Roman numerals are written one decimal place at a time, largest first.
- LXXXtens · 8L (50) plus XXX (30) makes 80.
- IVones · 4I before V means 5 − 1 = 4. This saves writing IIII.
80 + 4 = 84
The pair IV uses subtraction: a smaller letter before a larger one is taken away from it. Only six pairs work this way: IV, IX, XL, XC, CD and CM. More on subtraction
Mistakes to avoid
- Not LXXXIIII (8 letters). That adds everything up without subtraction. The Romans sometimes wrote numbers this way, and clocks still show 4 as IIII, but today LXXXIV (6 letters) is the standard.
About the number 84
- 84 is even and can be split into prime factors: 2 × 2 × 3 × 7, or in Roman numerals II × II × III × VII.
- LXXXIV has 6 letters. 396 of the numbers up to 1,000 have longer numerals.
Counting from 81 to 90
| Number | Roman numeral |
|---|---|
| 81 | LXXXI |
| 82 | LXXXII |
| 83 | LXXXIII |
| 84 | LXXXIV |
| 85 | LXXXV |
| 86 | LXXXVI |
| 87 | LXXXVII |
| 88 | LXXXVIII |
| 89 | LXXXIX |
| 90 | XC |