How it is calculated
| Solid | Volume |
|---|---|
| Cube | a³ |
| Box (rectangular prism) | length × width × height |
| Cylinder (tank) | π r² h |
| Sphere | ⁴⁄₃ π r³ |
| Cone | ⅓ π r² h |
| Rectangular pyramid | ⅓ × length × width × height |
1 m³ = 1,000 litres and 1 litre = 1,000 cm³.
Worked example
A cylindrical tank of radius 0.6 m and height 1.5 m: volume = π × 0.36 × 1.5 ≈ 1.696 m³ = 1,696 litres.
Frequently asked questions
How do I find a water tank’s capacity?
Compute the volume in cubic metres and multiply by 1,000 for litres.
Volume vs capacity?
Volume is the space an object takes; capacity is how much liquid it holds — equal for thin-walled containers.
Volume of a room?
Choose “box” and enter its length, width and height.