√70 ≈ 8.3666
√70 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 | 8 |
| 1 | 8.4 |
| 2 | 8.37 |
| 3 | 8.367 |
| 4 | 8.3666 |
| 5 | 8.36660 |
| 10 (digits) | 8.3666002653 |
70 has no perfect-square factor other than 1, so √70 is already in simplest radical form.
8.3666 × 8.3666 ≈ 70.0000, which is very close to 70.
Need another number? Use the square root calculator (also cube roots and other roots).
| Number | Square root |
|---|---|
| 66 | 8.1240 |
| 67 | 8.1854 |
| 68 | 8.2462 |
| 69 | 8.3066 |
| 71 | 8.4261 |
| 72 | 8.4853 |
| 73 | 8.5440 |
| 74 | 8.6023 |