Square Root Calculator › Square root of 90
Square Root of 90
√90 ≈ 9.486833
90 is not a perfect square, so √90 is an irrational number that is approximately 9.486833. In simplified radical form, √90 = 3√10.
√90 lies between √81 = 9 and √100 = 10.
| Number | 90 |
| Square root (decimal) | 9.486833 |
| Simplified radical | 3√10 |
| Perfect square? | No |
| Rational? | No |
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Frequently asked questions
Is 90 a perfect square?
No, 90 is not a perfect square, so its square root is irrational and approximately 9.486833.
What is the square root of 90 in simplest radical form?
√90 = 3√10 in simplest radical form.