Cubic Volume (ft³) Calculator
Enter length, width, and height, then click Calculate to get cubic feet and related conversions.
Dimensions
For mixed units, use ft / in or m / cm. Results refresh only when you click Calculate.
Result
ft³
More conversions
Step-by-step derivation
Enter values and click Calculate to see the worked steps.
References
- 1 in = 0.0254 m
- 1 ft = 0.3048 m
- 1 yd = 0.9144 m
- 1 ft³ = 0.028316846592 m³
- 1 yd³ = 27 ft³
- 1 US gallon = 3.785411784 L
- 1 UK gallon = 4.54609 L
Use this Cubic Feet Calculator to find the volume of a rectangular room, box, container, or space from its length, width, and height.
Calculation Method
Convert all three measurements to feet, then use:
Cubic feet = length × width × height
ft³ = L × W × H
Common conversions include:
- 1 ft³ = 1,728 in³
- 1 yd³ = 27 ft³
- 1 ft³ = 0.028316846592 m³
Example
For a box measuring 6 ft × 4 ft × 3 ft:
Volume = 6 × 4 × 3
Volume = 72 ft³
Important Note
This formula assumes a rectangular or box-shaped space. Cylinders, spheres, sloped containers, and irregular shapes require different volume formulas.
Outside dimensions may also differ from usable internal volume because of wall thickness or internal obstructions.