Calculate the total surface area of a rectangular box, the sum of all six outer faces. The formula is two times length times width, plus two times width times height, plus two times length times height, which for a box that is 5 by 4 by 3 gives 94 square units. This calculator also breaks the answer into the three face pairs so you can see how each dimension contributes, which is handy for wrapping paper, painting, labeling and material planning. Surface area is different from volume: it measures the skin of the box rather than the space inside, so it drives how much paint, cardboard or gift wrap you need. Enter the three dimensions in a consistent unit and the surface area returns in that unit squared. Everything is computed locally in your browser at full precision, and the total copies with a single click.
It sums all six faces, computed as twice the total of length by width, width by height and length by height.
Surface area tells you how much material wraps or covers a box, useful for packaging, paint and wrapping.
Yes. All six faces of the rectangular box are counted in the total surface area.
Calculate the total surface area of a rectangular box, the sum of all six outer faces. The formula is two times length times width, plus two times width times height, plus two times length times height, which for a box that is 5 by 4 by 3 gives 94 square units.
Yes. Surface Area of a Box Calculator is completely free, with no sign-up and no usage limits.
Yes. Surface Area of a Box Calculator runs in any modern web browser. There is nothing to download or install.
Yes. Surface Area of a Box Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.