√9 = 3
9 is a perfect square: 3 × 3 = 9, so √9 = 3 exactly (no decimals).
Need another number? Use the square root calculator (also cube roots and other roots).
| Number | Square root |
|---|---|
| 5 | 2.2361 |
| 6 | 2.4495 |
| 7 | 2.6458 |
| 8 | 2.8284 |
| 10 | 3.1623 |
| 11 | 3.3166 |
| 12 | 3.4641 |
| 13 | 3.6056 |