Square Root Calculator
Calculate square root with Calculator 360 using the available inputs.
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How to use this calculator
The principal square root of a nonnegative number is the nonnegative value whose square equals that number.
A perfect square has an integer square root. For example, 72 = 36 × 2, so √72 = 6√2. Decimal results may be approximations.
Frequently asked questions
How can I recognize a perfect square?
Its square root is an integer, such as √81 = 9.
Can a negative number have a real square root?
No. This calculator returns real square roots only.