Shape
Volume calculator
Cubic Feet Calculator
Enter dimensions in feet, inches, yards, or metric units and get a cubic feet result.
Calculating
Unit converter
Cubic volume unit converter
1 m³35.31 ft³
ft³35.31 ft³
yd³1.31 yd³
liters1,000 liters
US gal264.17 US gal
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Open a focused calculator when the main keyword changes.
How to use
How to calculate volume for your project
Switch between these options to match the way you are using the calculator right now.
Enter one shape and read the live total
- Choose the shape that matches the object you are measuring.
- Enter the required dimensions and confirm the input unit.
- Use the result panel to read cubic meters, cubic feet, liters, or gallons.
Start with length, width, and height in feet for a direct ft³ result.
Guide
Cubic feet calculator guide
Use this cubic feet calculator when measurements are in feet or inches and the result needs to be shown in ft3.
Cubic feet formula
For a rectangular shape, cubic feet = length in feet x width in feet x height in feet. If dimensions are in inches, convert each dimension to feet first.
Example cubic feet calculation
A storage box is 6 ft long, 3 ft wide, and 2 ft high.
6 x 3 x 2 = 36
The box volume is 36 ft3.
Unit notes
- 12 inches equals 1 foot, so divide inch dimensions by 12 before multiplying by hand.
- 1 cubic yard equals 27 cubic feet.
- Cubic feet are useful for room volume, storage, boxes, and US material estimates.
Best uses
- Room volume in ft3
- Storage boxes
- Moving and packing
- Air volume estimates
Common mistakes
- Dividing the final cubic inches result by 12 instead of by 1728.
- Using square feet when the height or depth is missing.
- Forgetting that each inch dimension must be converted before multiplying.
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How do I calculate cubic feet?
Multiply length, width, and height in feet. If a dimension is in inches, convert it to feet before multiplying.
How many cubic feet are in one cubic yard?
One cubic yard contains 27 cubic feet.
Can I calculate cubic feet from inches?
Yes. The calculator can accept inch dimensions and convert the result to cubic feet.
Is cubic feet the same as square feet?
No. Square feet measure area with two dimensions. Cubic feet measure volume with three dimensions.
When should I use a cubic feet calculator?
Use it when storage, room volume, box volume, or a supplier reference uses ft3 as the final unit.
This calculator provides estimates based on the dimensions and assumptions you enter. For engineering, structural, freight, or purchasing decisions, verify the result with a qualified professional or supplier.