Square Root Calculator › Square root of 40
Square Root of 40
√40 ≈ 6.324555
40 is not a perfect square, so √40 is an irrational number that is approximately 6.324555. In simplified radical form, √40 = 2√10.
√40 lies between √36 = 6 and √49 = 7.
| Number | 40 |
| Square root (decimal) | 6.324555 |
| Simplified radical | 2√10 |
| Perfect square? | No |
| Rational? | No |
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Frequently asked questions
Is 40 a perfect square?
No, 40 is not a perfect square, so its square root is irrational and approximately 6.324555.
What is the square root of 40 in simplest radical form?
√40 = 2√10 in simplest radical form.