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Cubic Feet Calculator

A cubic feet calculator converts length, width and height into cubic feet — and into cubic yards, cubic metres and gallons. It is the everyday volume tool for sizing a box or freezer, working out storage and shipping space, or converting a bagged-material volume.

Your measurements

Result

Enter the three dimensions in feet (or metres) and it returns the volume four ways, so whatever unit your supplier, mover or appliance uses, you have the number.

How it is calculated

Volume = length × width × height with all three in feet. One cubic foot is about 7.48 US gallons, 28.3 litres, or 1/27 of a cubic yard. Dimensions entered in metres are converted (1 m³ = 35.31 ft³). Add the volumes of separate boxes for irregular shapes.

Steps

Enter length, width and height in feet (or metres).
Read the cubic feet — the base volume figure.
Use cubic yards for bulk soil, gravel or concrete orders.
Use gallons for tanks and liquid capacity.
For an odd shape, split it into boxes and add the volumes.

Worked example

A 10 × 8 × 4 ft space is 320 cubic feet — about 11.9 cubic yards, or roughly 2,394 US gallons.

Common questions

How do I calculate cubic feet?

Multiply length × width × height, all measured in feet. A 10 × 8 × 4 ft space is 320 cubic feet.

How many cubic feet in a cubic yard?

27. Divide cubic feet by 27 to get cubic yards, which is how bulk soil, gravel and concrete are ordered.

How many gallons in a cubic foot?

About 7.48 US gallons (28.3 litres). The calculator shows gallons and litres alongside.

What if my measurements are in inches?

Divide each by 12 to get feet first, or measure in feet. The calculator works in feet (or metres).