√11 ≈ 3.3166
√11 is an irrational number, so its decimals never end or repeat. It sits between 3 and 4 because 3² = 9 and 4² = 16.
| Decimal places | Value |
|---|---|
| 0 | 3 |
| 1 | 3.3 |
| 2 | 3.32 |
| 3 | 3.317 |
| 4 | 3.3166 |
| 5 | 3.31662 |
| 10 (digits) | 3.3166247904 |
11 has no perfect-square factor other than 1, so √11 is already in simplest radical form.
3.3166 × 3.3166 ≈ 10.9998, which is very close to 11.
Need another number? Use the square root calculator (also cube roots and other roots).
| Number | Square root |
|---|---|
| 7 | 2.6458 |
| 8 | 2.8284 |
| 9 | 3 |
| 10 | 3.1623 |
| 12 | 3.4641 |
| 13 | 3.6056 |
| 14 | 3.7417 |
| 15 | 3.8730 |