Square Root Calculator › Square root of 45
Square Root of 45
√45 ≈ 6.708204
45 is not a perfect square, so √45 is an irrational number that is approximately 6.708204. In simplified radical form, √45 = 3√5.
√45 lies between √36 = 6 and √49 = 7.
| Number | 45 |
| Square root (decimal) | 6.708204 |
| Simplified radical | 3√5 |
| Perfect square? | No |
| Rational? | No |
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Frequently asked questions
Is 45 a perfect square?
No, 45 is not a perfect square, so its square root is irrational and approximately 6.708204.
What is the square root of 45 in simplest radical form?
√45 = 3√5 in simplest radical form.