Floor, wall, and ceiling square footage for any room shape.
Enter each rectangle of the L-shape separately.
Gross wall area is the total surface including windows and doors. Net wall area subtracts those openings — useful for calculating paint or drywall quantities. For flooring, use floor area only.
For irregular rooms, divide the space into simple rectangles, calculate each, then add them together. This calculator handles L-shapes directly, but any irregular room can be broken down into rectangles.