√85 ≈ 9.2195
√85 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 | 9.2 |
| 2 | 9.22 |
| 3 | 9.220 |
| 4 | 9.2195 |
| 5 | 9.21954 |
| 10 (digits) | 9.2195444573 |
85 has no perfect-square factor other than 1, so √85 is already in simplest radical form.
9.2195 × 9.2195 ≈ 84.9992, which is very close to 85.
Need another number? Use the square root calculator (also cube roots and other roots).
| Number | Square root |
|---|---|
| 81 | 9 |
| 82 | 9.0554 |
| 83 | 9.1104 |
| 84 | 9.1652 |
| 86 | 9.2736 |
| 87 | 9.3274 |
| 88 | 9.3808 |
| 89 | 9.4340 |