√99 ≈ 9.9499
√99 is an irrational number, so its decimals never end or repeat. It sits between 9 and 10 because 9² = 81 and 10² = 100.
| Decimal places | Value |
|---|---|
| 0 | 10 |
| 1 | 9.9 |
| 2 | 9.95 |
| 3 | 9.950 |
| 4 | 9.9499 |
| 5 | 9.94987 |
| 10 (digits) | 9.9498743711 |
99 = 9 × 11 and √9 = 3, so √99 = 3√11.
9.9499 × 9.9499 ≈ 99.0005, which is very close to 99.
Need another number? Use the square root calculator (also cube roots and other roots).
| Number | Square root |
|---|---|
| 95 | 9.7468 |
| 96 | 9.7980 |
| 97 | 9.8489 |
| 98 | 9.8995 |
| 100 | 10 |
| 101 | 10.0499 |
| 102 | 10.0995 |
| 103 | 10.1489 |