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MathAnswer the three percentage questions people ask most, with the right inputs for each one.
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Inputs
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Output
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MathUpdated · Aug 2026
Square Root Calculator
Find an exact or approximate square root, bracket non-perfect squares, and understand negative inputs.
Start with your numbers
Square Root Calculator
Change the inputs that matter to your decision. Optional assumptions stay collapsed until you need them.
Radicand
Negative inputs are supported and shown as imaginary roots.
Square root
Result
5
√25 = 5
Perfect squareYes
Lower square√25 = 5
Upper square√25 = 5
25 is a perfect square.
√25 = 5
Verification: 5 × 5 = 25.
Display values are rounded for readability.
/ 01 · FAQ
Frequently asked questions
Practical notes about the inputs, assumptions, and result.
A perfect square is a non-negative number whose principal square root is an integer, such as 25 and 5.
/ 02 · RELATED
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