√256 = 16
256 is a perfect square: 16 × 16 = 256, so √256 = 16 exactly (no decimals).
Need another number? Use the square root calculator (also cube roots and other roots).
| Number | Square root |
|---|---|
| 199 | 14.1067 |
| 200 | 14.1421 |
| 225 | 15 |
| 250 | 15.8114 |
| 300 | 17.3205 |
| 324 | 18 |
| 400 | 20 |
| 500 | 22.3607 |