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What is the Square Root of 9?

The square root of 9 is 3. Calculate another value or review the exact form, nearby perfect powers, and verification.

Answer

Square Root√9 = 3
ExactPerfect squareRational
Exact form3
Perfect squareYes
Number typeRational
Verification32 ≈ 9

On this page

How the answer is calculated

We solve x2 = 9. The resulting value is x = 3.

Verification: 32 ≈ 9.

Simplified radical form

The square root of 9 in simplified radical form is 3.

There are no square factors that can be taken outside the radical, so 3 is already in simplest radical form.

Nearest Perfect squares

PositionBaseValue
Lower or equal39
Upper or equal39

Nearby square roots

NumberSquare root
√62.4494897428
√72.6457513111
√82.8284271247
√93
√103.1622776602
√113.3166247904
√123.4641016151

Number properties

Is 9 a perfect square?

Yes. Its square root is the whole number 3.

Is the square root rational or irrational?

3 is rational because it is a whole number.

Visual guide

Square Root function graph

See how the result changes as the input moves across positive and negative values. Square roots are shown for non-negative inputs; cube roots continue through negative inputs.

Common questions

Frequently asked questions

It asks for the number that, when raised to the power of 2, equals 9.