Cubic Feet Calculator
Calculate cubic feet (ft³) from length, width, and height — enter dimensions in feet, inches, metres, centimetres, or yards.
Reviewed October 7, 2026 Runs in your browser — inputs are never stored
Volume
720.0000 ft³
m³
20.3881
in³
1244160.0000
gallons (US)
5385.9744
litres
20388.0960
This tool provides general unit conversions for everyday and educational use. For regulated, legal, or scientific applications, verify conversion factors against the applicable official standard.
About the Cubic Feet Calculator
The cubic feet calculator finds the volume of a box-shaped space from its length, width and height. You can enter dimensions in feet, inches, metres, centimetres or yards; the tool converts them and returns cubic feet along with cubic yards, cubic metres and litres. Cubic feet are used for room sizes, appliance capacities, shipping and moving estimates.
How to use it
- 1Choose the unit your measurements are in.
- 2Enter length, width and height.
- 3Read the volume in cubic feet and the equivalent units.
- 4Copy, share or print the result with the buttons below it.
Worked example
a room 10 ft × 8 ft × 9 ft holds 720 cubic feet, which is 720 ÷ 27 ≈ 26.7 cubic yards or about 20.4 m³.
How it works
Formula
Volume (ft³) = Length (ft) × Width (ft) × Height (ft)
Applications
- Estimating shipping container and box volume
- Air conditioner BTU sizing (room cubic footage)
- Concrete and fill volume estimates
- Freight shipping cost calculations
Common use cases
- Sizing a moving truck or storage unit
- Estimating room volume for heating or air conditioning
- Calculating shipping volume
Frequently asked questions
A:Divide by 27 (since 1 yd = 3 ft, so 1 yd³ = 27 ft³).
A:1 US gallon = 0.133681 cubic feet, so 1 cubic foot = 7.4805 US gallons.
Reviewed for accuracy · Last updated October 7, 2026
Conversion factors are based on internationally defined SI units and standard metric/imperial equivalence tables.
CalcWisee Editorial Team
Calculator development and formula review
CalcWisee is an independent site founded by Ayman. Every calculator is built from a published formula or official definition, tested against hand-worked examples before it goes live, and corrected promptly when a reader reports an issue to ayman@calcwisee.com.
Expertise: Financial mathematics, Health and fitness formulas, Applied mathematics, Unit conversion standards
References & sources
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