√12 ≈ 3.4641
√12 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 | 3.5 |
| 2 | 3.46 |
| 3 | 3.464 |
| 4 | 3.4641 |
| 5 | 3.46410 |
| 10 (digits) | 3.4641016151 |
12 = 4 × 3 and √4 = 2, so √12 = 2√3.
3.4641 × 3.4641 ≈ 12.0000, which is very close to 12.
Need another number? Use the square root calculator (also cube roots and other roots).
| Number | Square root |
|---|---|
| 8 | 2.8284 |
| 9 | 3 |
| 10 | 3.1623 |
| 11 | 3.3166 |
| 13 | 3.6056 |
| 14 | 3.7417 |
| 15 | 3.8730 |
| 16 | 4 |