Calculate rectangular area in square feet from length and width measurements in feet.
Floor area, tile quantities, paint coverage and interior finishing material estimates.
Enter the requested values above and select Calculate. The result updates immediately on the page, so you can change one value and compare different scenarios without leaving the calculator.
A 20 ft by 15 ft room contains 300 square feet.
Calculate rectangular area in square feet from length and width measurements in feet. It is designed for quick estimates and everyday problem solving. When a calculation affects a contract, tax filing, medical decision or other high-stakes situation, verify the result with the appropriate professional or authoritative source.
A room 12 feet long by 10 feet wide has area 12 × 10 = 120 square feet. To estimate a different shaped floor, split it into non-overlapping rectangles and add their areas.
Before buying materials: floor coverage is not always the amount you need to order. Waste, cutting, pattern matching, and product carton sizes can change the final quantity. Measure in feet consistently before multiplying.
Calculate rectangular area in square feet from length and width measurements in feet.
Square feet = length × width.
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