The calculation
Area = length × width
Use the same unit for both measurements. The calculator converts meters, inches, centimeters, or yards before combining areas.
Square Footage Calculator
Calculate one room or combine multiple areas in square feet, square metres, and square yards.
Add room dimensions below. The combined area updates as you type.
01 — Your measurements
Rooms & areas
Results update automatically as you type.
Plan the next step
Turn your area into a volume estimate
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Quick examples
10 ft × 12 ft120 sq ft
3 m × 4 m≈ 129.17 sq ft
10×12 + 8×10200 sq ft
Split irregular spaces into simple rectangles and add each section.
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Area questions
Measure once, understand the result
01How do I calculate square footage?+
Measure the length and width of a rectangular space in feet, then multiply them together. For an irregular space, divide it into rectangles, calculate each area, and add the results.
02What is the formula for square footage?+
The formula is area = length × width. When both measurements are in feet, the result is in square feet. This calculator converts other units to feet before calculating.
03How do I calculate square footage for multiple rooms?+
Calculate length × width for each room, then add all room areas together. Use Add another room here and the combined total updates automatically.
04How many square feet is a 10×12 room?+
A room measuring 10 feet by 12 feet has an area of 120 square feet because 10 × 12 = 120.
05Can I use this calculator for flooring?+
Yes. The calculated floor area is a useful starting point for flooring, carpet, or tile. Add the waste allowance recommended for your product and installation pattern before purchasing.
06Can I convert square feet to square meters?+
Yes. One square foot equals approximately 0.092903 square meters. The calculator displays square feet, square meters, and square yards together.