Volume calculator
A cubic centimetre is a millilitre, so a box measured in centimetres gives you litres without a second conversion. The same box measured in inches or feet is converted for you.
Volume is the space a solid encloses. A box is length times width times height; a cylinder is π times the radius squared times the height; a sphere is four-thirds π times the radius cubed; a cone is a third of the matching cylinder. Each shape here also reports its surface area and its capacity in litres and US gallons.
How to use it
A cone is exactly one third of the cylinder that would contain it, and a pyramid is one third of its box. That is not a coincidence or an approximation: it falls out of the same integral, and it is worth remembering because it turns two formulas into one.
Questions
Half the diameter. Measuring across a tank gives the diameter, so halve it before entering it here.
Choose the cylinder or capsule, enter the measurements in inches or feet, and read the gallons row. The conversion is done from the cubed unit.
A cylinder with a hemispherical cap on each end. The shape of a propane tank or a pressure vessel.
Yes, base included, assuming a rectangular base and an apex over its centre. Take the base area off if the pyramid sits on the ground.