√55 ≈ 7.4162
√55 is an irrational number, so its decimals never end or repeat. It sits between 7 and 8 because 7² = 49 and 8² = 64.
| Decimal places | Value |
|---|---|
| 0 | 7 |
| 1 | 7.4 |
| 2 | 7.42 |
| 3 | 7.416 |
| 4 | 7.4162 |
| 5 | 7.41620 |
| 10 (digits) | 7.4161984871 |
55 has no perfect-square factor other than 1, so √55 is already in simplest radical form.
7.4162 × 7.4162 ≈ 55.0000, which is very close to 55.
Need another number? Use the square root calculator (also cube roots and other roots).
| Number | Square root |
|---|---|
| 51 | 7.1414 |
| 52 | 7.2111 |
| 53 | 7.2801 |
| 54 | 7.3485 |
| 56 | 7.4833 |
| 57 | 7.5498 |
| 58 | 7.6158 |
| 59 | 7.6811 |