√125 ≈ 11.1803
√125 is an irrational number, so its decimals never end or repeat. It sits between 11 and 12 because 11² = 121 and 12² = 144.
| Decimal places | Value |
|---|---|
| 0 | 11 |
| 1 | 11.2 |
| 2 | 11.18 |
| 3 | 11.180 |
| 4 | 11.1803 |
| 5 | 11.18034 |
| 10 (digits) | 11.1803398875 |
125 = 25 × 5 and √25 = 5, so √125 = 5√5.
11.1803 × 11.1803 ≈ 124.9991, which is very close to 125.
Need another number? Use the square root calculator (also cube roots and other roots).
| Number | Square root |
|---|---|
| 121 | 11 |
| 122 | 11.0454 |
| 123 | 11.0905 |
| 124 | 11.1355 |
| 126 | 11.2250 |
| 127 | 11.2694 |
| 128 | 11.3137 |
| 129 | 11.3578 |