Volume of a Cube

Learn how to find the volume of a cube.

Volume of a Cube Lesson

Cube Volume Formula

The formula for volume of a cube is given as:

V = a3

Where V is the volume and a is the edge length.

volume of a cube
The Formula for the Volume of a Cube
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Volume of a Cube Example Problems

Let's go through a couple of example problems together to practice finding the volume of a cube.

Example Problem 1

Find the volume of a cube with an edge length of 5.


  1. We can simply plug the edge length into the formula. This gives us:
  2. V = a3
  3. V = (5)3 = 125
  4. The volume of the cube is 125.

Example Problem 2

The volume of a cube is 343. What is the edge length?


  1. Let's plug the volume into the formula and then solve for the edge length a.
  2. V = a3
  3. 343 = a3
  4. 3√343 = a
  5. a = 7
  6. The edge length is 7.
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