Square Root of 81
Square Root Calculator
What is the square root of 81?
Answer
√81 = 9
The square root of 81 is 9.
81 is a perfect square because 9 × 9 = 81.
Verification
√81 = 9
9 × 9 = 81
Found an error in the calculation or the information?
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See Also
- Factors of a Number - List all Factors and Factor Pairs of a Number
- Prime Number Checker - Find out whether a given number is Prime or not
- Prime Factorization - Prime Factorization Calculator
- Prime Numbers List - List of all Prime Numbers - how many Prime numbers are between
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Square Root Table
| Number | Square Root | Perfect Square |
|---|---|---|
| 66 | 8.1240384046 | No |
| 67 | 8.1853527719 | No |
| 68 | 8.2462112512 | No |
| 69 | 8.3066238629 | No |
| 70 | 8.3666002653 | No |
| 71 | 8.4261497732 | No |
| 72 | 8.4852813742 | No |
| 73 | 8.5440037453 | No |
| 74 | 8.602325267 | No |
| 75 | 8.6602540378 | No |
| 76 | 8.7177978871 | No |
| 77 | 8.7749643874 | No |
| 78 | 8.8317608663 | No |
| 79 | 8.8881944173 | No |
| 80 | 8.94427191 | No |
| 81 | 9 | Yes |
| 82 | 9.0553851381 | No |
| 83 | 9.1104335791 | No |
| 84 | 9.1651513899 | No |
| 85 | 9.2195444573 | No |
| 86 | 9.2736184955 | No |
| 87 | 9.3273790531 | No |
| 88 | 9.3808315196 | No |
| 89 | 9.4339811321 | No |
| 90 | 9.4868329805 | No |
| 91 | 9.5393920142 | No |
| 92 | 9.5916630466 | No |
| 93 | 9.643650761 | No |
| 94 | 9.6953597148 | No |
| 95 | 9.7467943448 | No |
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