√28 ≈ 5.2915
√28 is an irrational number, so its decimals never end or repeat. It sits between 5 and 6 because 5² = 25 and 6² = 36.
| Decimal places | Value |
|---|---|
| 0 | 5 |
| 1 | 5.3 |
| 2 | 5.29 |
| 3 | 5.292 |
| 4 | 5.2915 |
| 5 | 5.29150 |
| 10 (digits) | 5.2915026221 |
28 = 4 × 7 and √4 = 2, so √28 = 2√7.
5.2915 × 5.2915 ≈ 28.0000, which is very close to 28.
Need another number? Use the square root calculator (also cube roots and other roots).
| Number | Square root |
|---|---|
| 24 | 4.8990 |
| 25 | 5 |
| 26 | 5.0990 |
| 27 | 5.1962 |
| 29 | 5.3852 |
| 30 | 5.4772 |
| 31 | 5.5678 |
| 32 | 5.6569 |