Square Root Calculator › Square root of 396
Square Root of 396
√396 ≈ 19.899749
396 is not a perfect square, so √396 is an irrational number that is approximately 19.899749. In simplified radical form, √396 = 6√11.
√396 lies between √361 = 19 and √400 = 20.
| Number | 396 |
| Square root (decimal) | 19.899749 |
| Simplified radical | 6√11 |
| Perfect square? | No |
| Rational? | No |
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Frequently asked questions
Is 396 a perfect square?
No, 396 is not a perfect square, so its square root is irrational and approximately 19.899749.
What is the square root of 396 in simplest radical form?
√396 = 6√11 in simplest radical form.