Cubic Feet Calculator
Calculate cubic feet from length, width and height — enter dimensions in feet, inches, cm, meters or yards and get cubic feet, yards, meters and gallons at once.
How to calculate cubic feet
Cubic feet measure volume — how much space something takes up. To find it, multiply length × width × height with every dimension in feet. This calculator lets you enter your measurements in feet, inches, centimetres, metres or yards and converts them to feet first, then shows the result in cubic feet plus cubic yards, cubic metres, gallons and litres.
cubic feet = length (ft) × width (ft) × height (ft)
For example, a box 3 ft long, 2 ft wide and 2 ft high holds 3 × 2 × 2 = 12 cubic feet. Measuring in inches instead? Divide each side by 12 first, or divide the cubic-inch total by 1728 (because 12 × 12 × 12 = 1728).
Cubic feet conversions
| 1 cubic foot equals | Value |
|---|---|
| Cubic yards | 0.03704 yd³ (1 yd³ = 27 ft³) |
| Cubic metres | 0.02832 m³ |
| Cubic inches | 1,728 in³ |
| US gallons | 7.4805 gal |
| Litres | 28.317 L |
Cubic feet come up everywhere — sizing a fridge or freezer, ordering mulch or concrete, working out shipping volume, or checking storage-unit space. Enter your dimensions above and read the answer in whichever unit you need.
Frequently asked questions
How do you calculate cubic feet?
Multiply length × width × height with all three measured in feet. For example, a box 3 ft × 2 ft × 2 ft is 3 × 2 × 2 = 12 cubic feet. If your dimensions are in inches, centimetres, metres or yards, this calculator converts them to feet first, so you can mix units freely.
How do you convert inches to cubic feet?
Divide each measurement in inches by 12 to get feet, then multiply the three. Equivalently, divide the volume in cubic inches by 1728 (since 12³ = 1728). Example: 24 in × 12 in × 12 in = 3456 cubic inches ÷ 1728 = 2 cubic feet. Select “inches” above and the tool handles it.
How many cubic feet are in a cubic yard?
There are 27 cubic feet in one cubic yard, because a yard is 3 feet and 3 × 3 × 3 = 27. To convert cubic feet to cubic yards, divide by 27. This calculator shows cubic yards next to cubic feet automatically.
How many cubic feet is a 5-gallon bucket?
One US gallon is about 0.1337 cubic feet, so 5 gallons is roughly 0.668 cubic feet. The other way around, one cubic foot holds about 7.48 US gallons. The calculator lists gallons next to the cubic-feet result.