Surface Area of a Cuboid Calculator
Calculates the surface area of a cuboid from the measurements you enter. Use any unit, as long as all inputs use the same one.
Result
- Surface area
- 62
How to use the surface area of a cuboid calculator
- Enter the length.
- Enter the width.
- Enter the height.
- The results update as you type, or press Calculate.
- Read the surface area first, then the supporting figures below it.
Formula
2(lw + lh + wh)
Worked example
For example, with these inputs:
- Length: 5
- Width: 3
- Height: 2
the calculator returns:
- Surface area: 62
Background
Rounding is a common source of small errors. Keep full precision during intermediate steps and round only the final answer to the number of decimal places or significant figures the question asks for.
Each formula has assumptions built in. Area formulas assume flat shapes, volume formulas assume regular solids and statistical measures assume the data you enter is the data you want to describe. Knowing the assumptions helps you pick the right tool.
Frequently asked questions
How does the surface area of a cuboid calculator work?
It applies this formula: 2(lw + lh + wh)
Can I use any units?
Yes, as long as every input uses the same unit. The answer will be in that unit (squared for areas, cubed for volumes).