Volume measures three-dimensional space. Cubic units express how many unit-sized cubes occupy a solid or container.
The underlying idea
For a cuboid, multiply length, width, and height. A cylinder uses πr²h. A cone uses one third of the corresponding cylinder volume.
Check internal dimensions
For a cuboid, multiply length, width, and height. A cylinder uses πr²h. A cone uses one third of the corresponding cylinder volume. Choose measurements that describe the same object, system, or period; changing the reference changes what the result means.
Worked example
A box with internal dimensions 2 m × 1 m × 0.5 m has capacity 1 m³, equal to 1,000 liters.
Put the method into practice
- Write down the quantity you need to find.
- Identify the measurements and their units.
- Convert units before doing the calculation.
- Apply the formula and keep unrounded intermediate values.
- Check whether the result is reasonable for your situation.
Try the Volume Calculator with your own values.
Common mistakes
Mixing units, using the wrong reference value, and rounding too early can all change the result. A calculator cannot repair inaccurate measurements. For project estimates, distinguish the calculated base quantity from allowances and supplier rounding.
What to learn next
Explore this topic’s related answers below for focused examples and alternative ways to check a result.
