House Square Footage
Calculator — Total Area

House square footage is the total interior floor area of a home measured in square feet. Add the area of every rectangular room together. A 2,000 sq ft (185.8 m²) home is the U.S. median for new construction. For room-by-room totals, see the bedroom or kitchen calculator.

To calculate house square footage, measure the length and width of every room in feet. Multiply length × width for each room and sum the results. Exclude unfinished basements, garages, and outdoor patios from real estate square footage.

Measure the length and width of every rectangular room inside the building. Calculate the area for each room, then add the totals together. Exclude unfinished basements and garages from standard real estate square footage. A house with a 250 sq ft living room, 180 sq ft kitchen, 200 sq ft bedroom, and 50 sq ft bathroom has a total area of 680 square feet.

For rooms with alcoves or closets, measure each rectangular section separately and add the areas. The Square Foot Calculator supports quantity input so you can calculate multiple rooms of the same size at once.