Volume Calculator
Calculate the volume of a cube, box, cylinder, sphere or cone.
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Volume Formulas
Covered shapes: cube a³, rectangular box a×b×c, cylinder π×r²×h, sphere 4⁄3×π×r³ and cone ⅓×π×r²×h. The result is in the cube of the unit you enter — cm gives cm³ (1,000 cm³ = 1 litre), m gives m³ (1 m³ = 1,000 litres). A litres conversion is shown automatically when you enter centimetres.
Frequently Asked Questions
How do I convert the result to litres?
If you entered centimetres, divide cm³ by 1,000 (the tool shows this automatically). If you entered metres, multiply m³ by 1,000.
Why is a cone exactly one-third of a cylinder?
A cone with the same base and height fills exactly one third of the cylinder — a classical geometry result provable with integration; three such cones fill the cylinder completely.
What if my tank is partially filled?
For a box or upright cylinder, use the liquid height as h to get the filled volume directly.
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Volume Calculator