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Volume Calculator
The volume of a box, cylinder or sphere — with the same volume in litres, for tanks, rooms and containers.
Only the dimensions for the shape you picked are used; the others are ignored.
Volume
How it works
Box: length × width × height Cylinder: π × radius² × height Sphere: 4/3 × π × radius³ 1 cubic metre = 1,000 litres
Worked example: a box 4 m × 3 m × 2 m holds 24 m³, which is 24,000 litres. A cylinder of radius 2 m and height 5 m holds π × 4 × 5 = 62.83 m³, and a sphere of radius 3 m holds 4/3 × π × 27 = 113.10 m³.
Frequently asked questions
How many litres are in a cubic metre?
Exactly 1,000. A 24 m³ tank therefore holds 24,000 litres.
Is this the inside or outside volume?
It is the volume from the dimensions you enter. For a tank, enter the inside dimensions to get the capacity.
What if my measurements are in centimetres?
Convert to metres first. A box of 400 cm × 300 cm × 200 cm is 4 m × 3 m × 2 m, which is 24 m³.
Why is the sphere formula 4/3 × π × r³?
That is the exact geometric result for a sphere. The 4/3 factor is what separates a sphere from a cylinder of the same radius and height.
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