Square Root Calculator › Square root of 840
Square Root of 840
√840 ≈ 28.982753
840 is not a perfect square, so √840 is an irrational number that is approximately 28.982753. In simplified radical form, √840 = 2√210.
√840 lies between √784 = 28 and √841 = 29.
| Number | 840 |
| Square root (decimal) | 28.982753 |
| Simplified radical | 2√210 |
| Perfect square? | No |
| Rational? | No |
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Frequently asked questions
Is 840 a perfect square?
No, 840 is not a perfect square, so its square root is irrational and approximately 28.982753.
What is the square root of 840 in simplest radical form?
√840 = 2√210 in simplest radical form.