Infolity
  1. Home
  2. Calculators
  3. Square Root

What is the Square Root of 324?

The square root of 324 is 18. Calculate another value or review the exact form, nearby perfect powers, and verification.

Answer

Square Root√324 = 18
ExactPerfect squareRational
Exact form18
Perfect squareYes
Number typeRational
Verification182 ≈ 324

On this page

How the answer is calculated

We solve x2 = 324. The resulting value is x = 18.

Verification: 182 ≈ 324.

Simplified radical form

The square root of 324 in simplified radical form is 18.

There are no square factors that can be taken outside the radical, so 18 is already in simplest radical form.

Nearest Perfect squares

PositionBaseValue
Lower or equal18324
Upper or equal18324

Nearby square roots

NumberSquare root
√32117.9164728672
√32217.9443584449
√32317.9722007556
√32418
√32518.0277563773
√32618.0554700853
√32718.08314132

Number properties

Is 324 a perfect square?

Yes. Its square root is the whole number 18.

Is the square root rational or irrational?

18 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 324.