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How to Get Cube Root on Windows Calculator

Reviewed by Calculator Editorial Team

Windows Calculator is a versatile tool that can perform basic arithmetic operations, but did you know it can also calculate cube roots? This guide will show you how to find the cube root of a number using Windows Calculator, including step-by-step instructions and practical examples.

How to Calculate Cube Root on Windows Calculator

The cube root of a number is a value that, when multiplied by itself three times, gives the original number. For example, the cube root of 27 is 3 because 3 × 3 × 3 = 27.

Windows Calculator provides a straightforward way to find cube roots without needing additional software or online tools. Here's how to do it:

Note: Windows Calculator does not have a dedicated cube root button. You'll need to use the exponentiation function to calculate cube roots.

Step-by-Step Guide

  1. Open Windows Calculator

    Press the Windows key + R to open the Run dialog box. Type "calc" and press Enter to open the Windows Calculator.

  2. Enter the Number

    Type the number for which you want to find the cube root. For example, if you want to find the cube root of 27, type "27".

  3. Access the Exponent Function

    Click on the "√x" button (square root) to open the advanced operations menu. Then, click on the "xʸ" button (exponentiation).

  4. Enter the Exponent

    Type "1/3" as the exponent. This represents the cube root function (since the cube root is the same as raising the number to the power of 1/3).

  5. Calculate the Result

    Press the equals (=) button to calculate the cube root. The result will be displayed on the calculator screen.

Worked Examples

Let's look at a couple of examples to see how this works in practice.

Example 1: Cube Root of 27

  1. Open Windows Calculator and type "27".
  2. Click on "√x" and then "xʸ".
  3. Type "1/3" as the exponent.
  4. Press "=". The result should be "3".

Verification: 3 × 3 × 3 = 27, so the cube root of 27 is indeed 3.

Example 2: Cube Root of 64

  1. Open Windows Calculator and type "64".
  2. Click on "√x" and then "xʸ".
  3. Type "1/3" as the exponent.
  4. Press "=". The result should be "4".

Verification: 4 × 4 × 4 = 64, so the cube root of 64 is indeed 4.

Cube Root Formula

The cube root of a number can be calculated using the following formula:

∛a = a^(1/3)

Where:

  • ∛a is the cube root of a
  • a is the number for which you want to find the cube root
  • ^(1/3) represents raising the number to the power of 1/3

This formula is what we used in the examples above. By raising a number to the power of 1/3, we effectively calculate its cube root.

Frequently Asked Questions

Can I find cube roots on Windows Calculator without using the exponent function?
No, Windows Calculator does not have a dedicated cube root button. You must use the exponentiation function with an exponent of 1/3 to calculate cube roots.
What if I get a negative result for the cube root?
The cube root of a negative number is negative. For example, the cube root of -8 is -2 because (-2) × (-2) × (-2) = -8.
Can I use Windows Calculator to find cube roots of decimal numbers?
Yes, you can use Windows Calculator to find cube roots of decimal numbers. Simply enter the decimal number and follow the same steps as with whole numbers.
Is there a difference between cube roots and square roots?
Yes, cube roots and square roots are different. The square root of a number is a value that, when multiplied by itself, gives the original number. The cube root is a value that, when multiplied by itself three times, gives the original number.