L × W square footage.
Length × Width for rectangular rooms. Break L-shaped rooms into rectangles and sum.
Useful for flooring, paint, tile, real-estate listings, and property tax.
This same rectangle-and-sum approach scales up to entire floor plans, not just single rooms — it's the basic building block behind most home square footage figures you see in listings.
12 × 10 ft = 120.00 sq ft.
Usually yes for materials estimates; check your local real-estate convention for listings.
Divide into rectangles and triangles, calculate each, sum.
Different appraisers and agents sometimes include or exclude areas like basements, garages, or covered porches differently — there's more regional variation in convention than most buyers expect.