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Cubic Feet Calculator

Calculate cubic feet for boxes, rooms and cylinders from any units.

Enter your values to see the result.

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Clear instructions

Find steps, examples and limitations below.

Use online

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Free to use

No sign-up required. Tool-specific limits may apply.

How to use the Cubic Feet Calculator

Calculate cubic feet for boxes, rooms and cylinders from any units.

  1. 1 Choose the shape and unit.
  2. 2 Enter the dimensions and how many items.
  3. 3 Read the volume in cubic feet and other units.

Example and practical tips

A moving box of 18 × 18 × 24 in holds 4.5 cubic feet.

Frequently asked questions

How do I convert cubic inches to cubic feet?

Divide by 1,728 (12 × 12 × 12).

How many gallons are in a cubic foot?

About 7.48 US gallons.

Report an issue

Something broken or not quite right? Tell us and we will look into it.