Square Root Calculator › Square root of 813
Square Root of 813
√813 ≈ 28.513155
813 is not a perfect square, so √813 is an irrational number that is approximately 28.513155. In simplified radical form, √813 = √813.
√813 lies between √784 = 28 and √841 = 29.
| Number | 813 |
| Square root (decimal) | 28.513155 |
| Simplified radical | √813 |
| Perfect square? | No |
| Rational? | No |
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Frequently asked questions
Is 813 a perfect square?
No, 813 is not a perfect square, so its square root is irrational and approximately 28.513155.
What is the square root of 813 in simplest radical form?
√813 = √813 in simplest radical form.