Square Root Calculator › Square root of 645
Square Root of 645
√645 ≈ 25.39685
645 is not a perfect square, so √645 is an irrational number that is approximately 25.39685. In simplified radical form, √645 = √645.
√645 lies between √625 = 25 and √676 = 26.
| Number | 645 |
| Square root (decimal) | 25.39685 |
| Simplified radical | √645 |
| Perfect square? | No |
| Rational? | No |
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Frequently asked questions
Is 645 a perfect square?
No, 645 is not a perfect square, so its square root is irrational and approximately 25.39685.
What is the square root of 645 in simplest radical form?
√645 = √645 in simplest radical form.