Square Root Calculator › Square root of 78
Square Root of 78
√78 ≈ 8.831761
78 is not a perfect square, so √78 is an irrational number that is approximately 8.831761. In simplified radical form, √78 = √78.
√78 lies between √64 = 8 and √81 = 9.
| Number | 78 |
| Square root (decimal) | 8.831761 |
| Simplified radical | √78 |
| Perfect square? | No |
| Rational? | No |
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Frequently asked questions
Is 78 a perfect square?
No, 78 is not a perfect square, so its square root is irrational and approximately 8.831761.
What is the square root of 78 in simplest radical form?
√78 = √78 in simplest radical form.