√86 ≈ 9.2736
√86 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 | 9.3 |
| 2 | 9.27 |
| 3 | 9.274 |
| 4 | 9.2736 |
| 5 | 9.27362 |
| 10 (digits) | 9.2736184955 |
86 has no perfect-square factor other than 1, so √86 is already in simplest radical form.
9.2736 × 9.2736 ≈ 85.9997, which is very close to 86.
Need another number? Use the square root calculator (also cube roots and other roots).
| Number | Square root |
|---|---|
| 82 | 9.0554 |
| 83 | 9.1104 |
| 84 | 9.1652 |
| 85 | 9.2195 |
| 87 | 9.3274 |
| 88 | 9.3808 |
| 89 | 9.4340 |
| 90 | 9.4868 |