Volume Calculator: Boxes, Cylinders, Cones, Spheres and More
Find the volume of eight common solids from their measurements, then read it in cubic inches, feet, yards, centimeters and meters, liters and US gallons.
A box holds its length times its width times its height. A slab 10 feet long, 10 feet wide and 6 inches (0.5 feet) deep holds 10 x 10 x 0.5 = 50 cubic feet, which is about 1.85 cubic yards, 1,416 liters or 374 US gallons.
Every figure assumes a solid with sharp edges and flat faces, measured exactly. Real containers have wall thickness, rounded corners and fill lines, and materials settle or compact, so order extra and check a container's stated capacity before relying on a figure for a purchase.
Volume
50 cu ft
- Cubic inches
- 86,400
- Cubic feet
- 50
- Cubic yards
- 1.8519
- Cubic meters
- 1.4158
- Cubic centimeters
- 1,415,842.3296
- Liters
- 1,415.8423
- US gallons
- 374.026
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About the Volume Calculator
Volume counts the one-unit cubes that fill a solid. For a box you multiply length, width and height. Shapes with a circular base use pi times the radius squared as the base, so a cylinder is that base times its height, and a cone or a pyramid holds exactly a third of the cylinder or box that would surround it. A sphere is four thirds of pi times the radius cubed, and a hemisphere is half of that. Mixed units are the usual error: every measurement has to be in the same unit before you multiply, so a slab 6 inches deep goes in as 0.5 feet alongside lengths in feet. Because volume grows with the cube of length, the conversions are larger than they look: a cubic yard is 27 cubic feet, a cubic foot is 1,728 cubic inches, and a cubic meter is 1,000 liters. A US gallon is defined as exactly 231 cubic inches, so gallons follow from the same figure. Results here are exact for the measurements you enter, rounded to four decimal places for display.
Frequently asked questions
How do I find cubic yards for concrete or mulch?+
A 10 by 10 foot slab 6 inches deep is 50 cubic feet, or about 1.85 cubic yards: choose Box, enter all three sizes in feet (6 inches as 0.5) and read the cubic yards line. Check how your supplier rounds, and allow extra for waste or uneven ground.
What is the difference between radius and diameter here?+
The cylinder, cone, sphere and hemisphere ask for the radius, the distance from the center to the edge. If you measured straight across, divide that diameter by 2 first.
How do I convert cubic feet to gallons?+
One cubic foot is 1,728 cubic inches, and a US gallon is 231 cubic inches, so one cubic foot holds about 7.48 gallons. The calculator shows gallons and liters for every shape, so you can skip the conversion.
Can it handle an irregular shape?+
Split it into the shapes listed here, find each volume in the same unit, and add them. A tank with a domed top, for example, is a cylinder plus a hemisphere.
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