√120 ≈ 10.9545
√120 is an irrational number, so its decimals never end or repeat. It sits between 10 and 11 because 10² = 100 and 11² = 121.
| Decimal places | Value |
|---|---|
| 0 | 11 |
| 1 | 11.0 |
| 2 | 10.95 |
| 3 | 10.954 |
| 4 | 10.9545 |
| 5 | 10.95445 |
| 10 (digits) | 10.9544511501 |
120 = 4 × 30 and √4 = 2, so √120 = 2√30.
10.9545 × 10.9545 ≈ 120.0011, which is very close to 120.
Need another number? Use the square root calculator (also cube roots and other roots).
| Number | Square root |
|---|---|
| 116 | 10.7703 |
| 117 | 10.8167 |
| 118 | 10.8628 |
| 119 | 10.9087 |
| 121 | 11 |
| 122 | 11.0454 |
| 123 | 11.0905 |
| 124 | 11.1355 |