About the square footage calculator
Square footage is the standard way to size homes, floors, paint jobs and landscaping. Measure each rectangular space, enter its length and width, and the calculator totals them. Split L-shaped rooms into two rectangles and add each as a row.
Formula
Area (sq ft) = length (ft) × width (ft). Total = sum of all rooms. 1 sq ft = 0.0929 m².
Frequently asked questions
How do I measure square footage of a room?
Measure the length and width in feet and multiply them. For irregular rooms, split the floor plan into rectangles and add the results.
How much extra flooring should I buy?
Order about 5% to 10% extra to cover cuts and mistakes, more for diagonal or patterned layouts.