Surface Area Calculator
Calculate the total surface area of a rectangular box (cuboid).
Calculate
Enter your values below.
Result
Surface area
0
Formula used
Surface area = 2(Length×Width + Length×Height + Width×Height)
Example: 4×3×2 box → surface area = 52 square units.
How to use this calculator
- Enter Length, Width, Height.
- Press Calculate to see your result instantly.
FAQ
Frequently asked questions
What shape does this apply to?
A rectangular box (cuboid), covering all six faces.
What's the difference between surface area and volume?
Surface area measures the outside covering (2D); volume measures the space inside (3D).
Can I use this for a cube?
Yes — enter equal length, width, and height.
What units is the result in?
Whatever linear unit you entered, squared.