√7 ≈ 2.6458
√7 is an irrational number, so its decimals never end or repeat. It sits between 2 and 3 because 2² = 4 and 3² = 9.
| Decimal places | Value |
|---|---|
| 0 | 3 |
| 1 | 2.6 |
| 2 | 2.65 |
| 3 | 2.646 |
| 4 | 2.6458 |
| 5 | 2.64575 |
| 10 (digits) | 2.6457513111 |
7 has no perfect-square factor other than 1, so √7 is already in simplest radical form.
2.6458 × 2.6458 ≈ 7.0003, which is very close to 7.
Need another number? Use the square root calculator (also cube roots and other roots).
| Number | Square root |
|---|---|
| 3 | 1.7321 |
| 4 | 2 |
| 5 | 2.2361 |
| 6 | 2.4495 |
| 8 | 2.8284 |
| 9 | 3 |
| 10 | 3.1623 |
| 11 | 3.3166 |