Square Root of 81
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What is the square root of 81?
Answer: √81 = 9 (Perfect Square)
The square root of 81 is 9.
81 is a perfect square because 9 × 9 = 81.
Verification
√81 = 9
9 × 9 = 81
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See Also
- Factors of a Number - List all Factors and Factor Pairs of a Number
- Is number a Prime - 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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<a href="https://calculat.io/en/number/square-root/81">Square Root of 81 (√81) - Calculatio</a>
Square Root Table
| Number | Square Root | Perfect Square |
|---|---|---|
| 66 | 8.124038 | No |
| 67 | 8.185353 | No |
| 68 | 8.246211 | No |
| 69 | 8.306624 | No |
| 70 | 8.3666 | No |
| 71 | 8.42615 | No |
| 72 | 8.485281 | No |
| 73 | 8.544004 | No |
| 74 | 8.602325 | No |
| 75 | 8.660254 | No |
| 76 | 8.717798 | No |
| 77 | 8.774964 | No |
| 78 | 8.831761 | No |
| 79 | 8.888194 | No |
| 80 | 8.944272 | No |
| 81 | 9 | Yes |
| 82 | 9.055385 | No |
| 83 | 9.110434 | No |
| 84 | 9.165151 | No |
| 85 | 9.219544 | No |
| 86 | 9.273618 | No |
| 87 | 9.327379 | No |
| 88 | 9.380832 | No |
| 89 | 9.433981 | No |
| 90 | 9.486833 | No |
| 91 | 9.539392 | No |
| 92 | 9.591663 | No |
| 93 | 9.643651 | No |
| 94 | 9.69536 | No |
| 95 | 9.746794 | No |
About "Square Root Calculator" Calculator
This calculator will help you find the square root of any number. For example, it can help you find out what is the square root of 81? (The answer is: 9). Enter a number (e.g. '81') and hit the 'Calculate' button.