Square Footage Calculator

Divide the irregular space into standard geometric shapes like rectangles, circles, or right triangles. Compute the area of each section separately, then sum them together to get the total square footage of the room.

No. Measure as accurately as possible to the nearest inch or centimeter. Rounding up individual wall measurements can accumulate errors, causing you to buy too much material. Measure precisely, then apply a standard waste factor at the end.

When installing flooring or wall panels, you have to cut materials to fit corners, vents, and borders. The cut-off scrap is usually unusable. Adding a standard 10% waste allowance ensures you have enough material to complete the job.

For a right triangle (like a corner closet), measure the two straight sides that meet at the 90-degree angle (the base and the height). Multiply the base by the height, then divide by 2.

Net area is the exact floor space inside the walls. Gross area is the total area including the waste allowance (typically 5% to 15% extra), which represents the total amount of material you should buy.