√82 ≈ 9.0554
√82 is an irrational number, so its decimals never end or repeat. It sits between 9 and 10 because 9² = 81 and 10² = 100.
| Decimal places | Value |
|---|---|
| 0 | 9 |
| 1 | 9.1 |
| 2 | 9.06 |
| 3 | 9.055 |
| 4 | 9.0554 |
| 5 | 9.05539 |
| 10 (digits) | 9.0553851381 |
82 has no perfect-square factor other than 1, so √82 is already in simplest radical form.
9.0554 × 9.0554 ≈ 82.0003, which is very close to 82.
Need another number? Use the square root calculator (also cube roots and other roots).
| Number | Square root |
|---|---|
| 78 | 8.8318 |
| 79 | 8.8882 |
| 80 | 8.9443 |
| 81 | 9 |
| 83 | 9.1104 |
| 84 | 9.1652 |
| 85 | 9.2195 |
| 86 | 9.2736 |