√16 = 4
16 is a perfect square: 4 × 4 = 16, so √16 = 4 exactly (no decimals).
Need another number? Use the square root calculator (also cube roots and other roots).
| Number | Square root |
|---|---|
| 12 | 3.4641 |
| 13 | 3.6056 |
| 14 | 3.7417 |
| 15 | 3.8730 |
| 17 | 4.1231 |
| 18 | 4.2426 |
| 19 | 4.3589 |
| 20 | 4.4721 |