√75 ≈ 8.6603
√75 is an irrational number, so its decimals never end or repeat. It sits between 8 and 9 because 8² = 64 and 9² = 81.
| Decimal places | Value |
|---|---|
| 0 | 9 |
| 1 | 8.7 |
| 2 | 8.66 |
| 3 | 8.660 |
| 4 | 8.6603 |
| 5 | 8.66025 |
| 10 (digits) | 8.6602540378 |
75 = 25 × 3 and √25 = 5, so √75 = 5√3.
8.6603 × 8.6603 ≈ 75.0008, which is very close to 75.
Need another number? Use the square root calculator (also cube roots and other roots).
| Number | Square root |
|---|---|
| 71 | 8.4261 |
| 72 | 8.4853 |
| 73 | 8.5440 |
| 74 | 8.6023 |
| 76 | 8.7178 |
| 77 | 8.7750 |
| 78 | 8.8318 |
| 79 | 8.8882 |