Calculate square footage from a length and width in any common unit. Add a quantity for repeated areas, a waste factor, and an optional price to get the area and cost.
Total Square Footage
— sq ft
Area in square feet.Usage Tip
Measure twice and to the widest points. For flooring or tile, add the waste factor here so the area you take to the store already includes the cushion.
THE MATH
Area = Length × Width (converted to feet)
Total = Area × number of areas
With waste = Total × (1 + waste%)
Total = Area × number of areas
With waste = Total × (1 + waste%)
Length and width are converted to feet, so the area comes out in square feet. 1 yard = 3 ft, 1 meter ≈ 3.281 ft, and inches divide by 12.
For rooms that are not simple rectangles, split them into rectangles, find each area, and add them up.
For rooms that are not simple rectangles, split them into rectangles, find each area, and add them up.
For L-shaped or irregular spaces, break them into rectangles and total the pieces, or run this once per section.
Add a waste factor for materials cut to fit — commonly about 10% for flooring and tile, more for diagonal or patterned layouts.
Materials sold by the box or sheet still need rounding up to whole units after you have the area.
Add a waste factor for materials cut to fit — commonly about 10% for flooring and tile, more for diagonal or patterned layouts.
Materials sold by the box or sheet still need rounding up to whole units after you have the area.