Volume Calculator
Compute the volume of a cube, box, cylinder or sphere.
Inputs
- Shape
- Side / Length / Radius (m)
- Width (m)
- Height (m)
What it does
Volume of a cube, box, cylinder or sphere.
Where it's used
Tanks, columns, excavation and storage capacity.
How to use it
- Choose the shape.
- Enter the dimensions; cylinders and spheres use the radius.
- Read the volume.
The formula explained
- Box
- length × width × height
- Cylinder
- π × r² × h
- Sphere
- ⁴⁄₃ × π × r³
Worked example
A round column 0.3 m in radius and 3 m tall.
Inputs:
- Shape: Cylinder
- Side / Length / Radius: 0.3 m
- Height: 3 m
The calculator gives:
- Result: 0.84823 m³
- Liters: 848.23
Tips and common mistakes
- 1 m³ = 1000 litres.
- Use the radius (half the diameter).
- Use the inside dimensions for tank capacity.
Questions people ask
How many litres are in a cubic metre?
One cubic metre holds 1000 litres, and one litre is 1000 cm³ (a cube 10 cm on each side). The calculator shows the result in both m³ and litres.
How do I find the volume of a cone or a pyramid?
A cone or pyramid holds exactly one third of the cylinder or box with the same base and height: V = ⅓ × base area × height. Work out the matching cylinder or box here and divide by 3.
How much does the water in a tank weigh?
Fresh water weighs about 1 kg per litre, so 1 m³ of water is roughly 1000 kg (one tonne). Sea water is about 3 % heavier. Tank supports must carry this weight as well as the tank itself.
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Enter your values to get the result with the formula, substituted values and an explanation of each step.