Calculate the volume in cubic feet for rectangular boxes, cylinders and triangular prisms. All dimensions are entered in feet, and results are automatically converted to cubic yards, cubic meters, litres and US gallons — useful for tanks, storage, fills and shipping.
Enter dimensions in feet to calculate.
Volume formulas vary by shape. All measurements must be in feet:
To convert inches to feet, divide by 12. For example, a 6-inch depth = 0.5 ft. To convert centimeters to feet, divide by 30.48.
Cubic feet are commonly used in the US for refrigerator and freezer capacity, HVAC ductwork, shipping volumes and concrete bag yields.
Measure the room's length, width and ceiling height in feet, then multiply all three. A 12×15 ft room with 9 ft ceilings has 1,620 cubic feet of air volume.
There are exactly 27 cubic feet in one cubic yard (3 ft × 3 ft × 3 ft = 27 ft³).
One 80 lb bag of pre-mix concrete yields approximately 0.60 cubic feet of mixed concrete, so you need about 1.67 bags per cubic foot — roughly 45 bags per cubic yard.