CALCULATOR

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## Surface Area of Cubes & Rectangular Prisms Calculator

What is your shape?

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INTRO

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The surface area of a 3D shape is equal to the sum of the areas of all the faces (sides) of that shape. A helpful way to think about it is:We can also think about surface area in terms of gifts! The surface area is like the minimum amount of wrapping paper we need to prep a gift for its surprise reveal. 🤩If we were to unwrap a gift, the amount of wrapping would be equal to the surface area of the object it was covering.When we “unwrap” a 3D shape, we get what we call a net. A surface area net shows us the different 2D shapes that make up the faces of the 3D shape.

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Pick a gift shape to unwrap:

We can then find the area of each face and then add them all together to find the total surface area.

Check out our or explore our and sections to learn more about how to find the surface area of cubes and rectangular prisms and test your understanding.

Calculator

Lesson

Practice

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KEY STEPS

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## How to Find Surface Area of Cubes and Rectangular Prisms

Shape

### Step 1. Unwrap the cube.

$s$

### Step 2. Calculate the area of each part of the net that makes up the cube.

$s$

Squares 1 - 6 | $A=s_{2}$ |

### Step 3. Add up the areas of the shapes that make up the cube.

LESSON

— Surface Area of Cubes

PRACTICE

— Surface Area of Cubes

LESSON

— Surface Area of Rectangular Prisms

PRACTICE

— Surface Area of Rectangular Prisms

CONCLUSION

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