Square Root Calculator › Square root of 820
Square Root of 820
√820 ≈ 28.635642
820 is not a perfect square, so √820 is an irrational number that is approximately 28.635642. In simplified radical form, √820 = 2√205.
√820 lies between √784 = 28 and √841 = 29.
| Number | 820 |
| Square root (decimal) | 28.635642 |
| Simplified radical | 2√205 |
| Perfect square? | No |
| Rational? | No |
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Frequently asked questions
Is 820 a perfect square?
No, 820 is not a perfect square, so its square root is irrational and approximately 28.635642.
What is the square root of 820 in simplest radical form?
√820 = 2√205 in simplest radical form.