Maths & numbers
Cuboid calculator
Calculate a rectangular box’s volume, surface and space diagonal.
A clear answer. Here’s how.
For a closed rectangular cuboid, volume = lwh, surface = 2(lw+lh+wh) and space diagonal = √(l²+w²+h²). All dimensions must share a unit.
See a worked example
Worked example
A fixed demonstration, separate from the values you enter above.
- Length
- 5
- Width
- 4
- Height
- 3
Example result
- Volume
- 60
- Surface area
- 94
- Space diagonal
- 7.07106781187