Surface Area Calculator
Add the areas of all six faces: 2(lw + lh + wh).
This calculator is free to use. Enable JavaScript to enter your values and see a result instantly.
How it works
Add the areas of all six faces: 2(lw + lh + wh).
Worked example
A 10 × 5 × 3 box has surface area 190 square units.
Keep in mind
Results are estimates; check the assumptions for your situation.