Welcome to our Area of a Cube Calculator page.

We explain how to find the surface area of a cube and provide a quick calculator to work it out for you, step-by-step.

There is a separate calculator which will find the length of the side of a square, if you already know the surface area.

You can also take a look at our worked examples and try our practice sheets to help you master this skill.

Quicklinks to ...

This calculator finds the area of a cube when the side length is known.

- Choose the length of side value: you can choose a whole number, decimal or fraction.
- You can type a fraction by typing the numerator then '/' then the denominator.
- You can type a mixed number by typing the whole-number part, then a space then the fraction part.
- Examples: 2 1/2 (two and one-half); 3 4/5 (three and four-fifths); 7 1/3 (seven and one-third).

- Choose your units of measurement (default is none)
- Choose your desired accuracy (default is 2 decimal places)
- Click the Find Area button
- You will be shown the area as a decimal (and also a fraction if you typed the length as a fraction).

This calculator finds the side length of the square when the area is known.

- Choose the area value: you can choose a whole number, decimal or fraction.
- Choose your units of measurement (default is none)
- Choose your desired accuracy (default is 2 decimal places)
- Click the Find Side Length button
- You will be shown the side length as a decimal to the required accuracy.

To find the surface area of a cube, we need to add up the areas of each of the 6 identical faces.

The area of each face is s^{2}, so this gives us a total area of 6s^{2}.

The formula for the area of a cube is: A = 6s^{2}, where s is the length of one of the sides.

Find the surface area of the cube below.

The length of each side of the cube is 17 cm.

The formula for the surface area of a cube is \[ A = 6 s^2, \; where \; s \; is \; the \; length \; of \; each \; side. \]

So this means that \[ A = 6 \cdot 17^2 = 6 \cdot 17 \cdot 17 = 1734 \]

This means that the surface area of the cube is 1734 cm^{2}.

Find the surface area of the cube below, giving your answer as a fraction.

The length of each side of the cube is 8 ½ inches.

The formula for the surface area of a cube is \[ A = 6 s^2, \; where \; s \; is \; the \; length \; of \; each \; side. \]

The area of the cube: \[ A = 6 \cdot (8 {1 \over 2}) ^2 = 6 \cdot (8 {1 \over 2}) \cdot (8 {1 \over 2}) = 6 \cdot {189 \over 4} = {867 \over 2} \]

This means that the surface area of the cube is: \[ {867 \over 2} \; or\; 433 {1 \over 2} \; square \; inches \]

Find the surface area of the cube below.

The length of each side of the cube is 1.4 meters.

The area of the cube: \[ A = 6 \cdot (1.4) ^2 = 6 \cdot (1.4) \cdot (1.4) = 6 \cdot 1.96 = 11.76 \]

This means that the surface area of the cube is: \[ 1.76 \; m^2 \]

Use the surface area of the cube below to find the length of each side correct to 1 decimal place.

The surface area of the cube is 980 cm^{2}.

The formula for the surface area of a cube is \[ A = 6 s^2, \; where \; s \; is \; the \; length \; of \; each \; side. \]

We can rearrange this equation in terms of the side length s to give us:

\[ s = \sqrt ({A \over 6}) \]

Substituting the value of A into this equation gives us:

\[ s = \sqrt ({980 \over 6 }) = \sqrt ({490 \over 3}) = 12.78019...\]

This means that the length of each side is 12.8 cm to 1 decimal place.

We have created two worksheets for you to practice the skill of finding the area and sde lengths of a range of different cubes.

Sheet 1: you have to find the surface area of different cubes using the side length measurements.

Sheet 2: you have to find the side lengths of different cubes using the surface area measurements.

You can use our area of a cube calculator to check you working out if you get stuck!

Take a look at some more of our worksheets similar to these.

We also have a volume of a cube calculator page which is similar to this page, but with volume instead of area.

There are worksheets, worked examples and support as well as a calculator to help you find the volume of a range of cubes.

We have a range of other area worksheets and support pages for a range of different 2d shapes.

We have a range of other area calculators to help you find the area of a range of different 2d and 3d shapes.

We have a wide range of free math calculators to help you.

Most of our calculators show you their working out so that you can see exactly what they have done to get the answer.

Our calculator hub page contains links to all of our calculators!

How to Print or Save these sheets

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Follow these 3 easy steps to get your worksheets printed out perfectly!

How to Print or Save these sheets

Need help with printing or saving?

Follow these 3 easy steps to get your worksheets printed out perfectly!

The Math Salamanders hope you enjoy using these free printable Math worksheets and all our other Math games and resources.

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We have updated and improved our fraction calculators to show you how to solve your fraction problems step-by-step!

Take a look and try them out!

Have a look at some of our most popular pages to see different Math activities and ideas you could use with your child

- Reverse Percentage Calculator
- List of Geometric Shapes
- Equivalent Fractions
- 3d Geometric Shapes
- Perimeter Worksheets

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