Why can't I find the square root of a negative number?

No real number multiplied by itself gives a negative result, so negative numbers have no real square root — only a complex one, which this tool does not compute.

Is the square root always a whole number?

No — only perfect squares (like 4, 9, 16, 25) have whole-number square roots. Most numbers have irrational square roots.

Square Root Calculator

Find the square root of a number instantly.

Number

Square root: 8

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How It Works

Enter a non-negative number to see its square root, updated instantly.

√x is the number that, multiplied by itself, equals x

Example

The square root of 64 is 8, since 8 × 8 = 64.

Frequently Asked Questions

Why can't I find the square root of a negative number?: No real number multiplied by itself gives a negative result, so negative numbers have no real square root — only a complex one, which this tool does not compute.
Is the square root always a whole number?: No — only perfect squares (like 4, 9, 16, 25) have whole-number square roots. Most numbers have irrational square roots.

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