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Cuboid Calculator

Your inputs

Volume = width × height × depth. Use the same length unit. Litres assume the dimensions are in centimetres (1 litre = 1000 cm³).

Live results

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Result visualization

Calculate a box or cuboid's volume (also in litres), surface area, space diagonal and all three face diagonals from its length, width and height — free, instant, no signup.

100% free · No sign-up · No daily limits · No watermarks · Processed in your browser — files never leave your device

UNDERSTAND YOUR RESULTS

Cuboid Calculator guide

Calculate a box or cuboid's volume (also in litres), surface area, space diagonal and all three face diagonals from its length, width and height — free, instant, no signup.

How to use this tool

  1. Enter Width, Height, Depth.
  2. Change a value to update the results and illustration. Check any validation message before using the output.
  3. Copy the results or download CSV. Reset restores the example values.

A worked example

Dimensions 4, 3, 5 give volume 60 and surface area 94, face diagonals of 5, about 6.403 and about 5.831, and a volume of 0.06 litres when the dimensions are centimetres.

What you can do with this tool

How it works

Volume = width × height × depth. Use the same length unit. Litres assume the dimensions are in centimetres (1 litre = 1000 cm³).

Frequently asked questions

How should I interpret the illustration?

It is a visual aid, not a replacement for the numeric output. Some charts compare values with different units, and those magnitudes are not directly comparable.

Can I use the result without checking the inputs?

Check units, signs, assumptions and rounding first. The tool cannot know whether the values you enter describe the real situation correctly.