Square Root Calculator › Square root of 42
Square Root of 42
√42 ≈ 6.480741
42 is not a perfect square, so √42 is an irrational number that is approximately 6.480741. In simplified radical form, √42 = √42.
√42 lies between √36 = 6 and √49 = 7.
| Number | 42 |
| Square root (decimal) | 6.480741 |
| Simplified radical | √42 |
| Perfect square? | No |
| Rational? | No |
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Frequently asked questions
Is 42 a perfect square?
No, 42 is not a perfect square, so its square root is irrational and approximately 6.480741.
What is the square root of 42 in simplest radical form?
√42 = √42 in simplest radical form.