Volume Calculator
Find the volume of cubes, boxes, spheres and more.
How to use
- 1 Choose the shape you want to measure.
- 2 Type each required dimension into its field, using the same unit throughout.
- 3 Read the calculated volume below.
- 4 Copy the result for your notes or worksheet.
About Volume Calculator
The Volume Calculator works out how much space a three-dimensional shape occupies from a handful of measurements.
Pick the shape you are working with — a cube, a rectangular box, a sphere, a cylinder or a cone — type in its dimensions, and the volume appears instantly.
Each shape uses the standard geometric formula: a cube is the side cubed, a box is length times width times height, a sphere is four-thirds pi times the radius cubed, a cylinder is pi times radius squared times height, and a cone is one third of that cylinder.
Because the same length unit is used for every dimension, the answer comes out in the cube of that unit — centimetres in give cubic centimetres out, metres give cubic metres, and so on.
This is handy for homework, packing and shipping estimates, tank and container sizing, aquarium volumes, or any quick "how much will fit" question.
The maths happens locally in your browser, so nothing you type is sent anywhere, and the tool keeps working offline once the page has loaded.
Enter a value and the result updates live as you type, with clear messages if a measurement is missing or not a positive number.
FAQ
What units does the result use?
The calculator is unit-agnostic. If you enter all dimensions in centimetres the volume is in cubic centimetres; in metres it is cubic metres. Just keep every dimension in the same unit.
Why do I get an error?
Every dimension must be a positive, finite number. An empty field, a zero, a negative value or text will show a specific message telling you which input to fix.