What is cubic footage?
Cubic footage measures the amount of three-dimensional space inside a box, room, excavation, slab, container, or other shape with length, width, and height. This cubic footage calculator keeps the calculation simple: enter three measurements, choose feet or inches, and the tool converts everything consistently.
Cubic footage formula
cubic feet = length × width × height
If measurements are in inches, divide the final cubic inches by 1,728 to get cubic feet.
1 cubic yard = 27 cubic feet
Example
For a box that is 12 ft long, 8 ft wide, and 4 ft high:
12 × 8 × 4 = 384 cubic feet
That is 14.22 cubic yards.
Where cubic footage is useful
You can use the result when estimating concrete, fill material, storage capacity, excavation volume, or other construction quantities. For irregular spaces, divide the shape into smaller sections and add their volumes.
Frequently asked questions
How do I calculate cubic footage?
Multiply length by width by height after making sure all three measurements use the same unit.
How many cubic feet are in a cubic yard?
One cubic yard contains 27 cubic feet.
Can I enter measurements in inches?
Yes. Select inches and the calculator converts the three measurements before reporting cubic feet.
What if the space is not a perfect box?
Break the space into simple sections, calculate each section separately, and add the results.