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Square Footage Calculator
Enter length and width in any common unit. We compute square feet, square yards, square meters, and acres — useful for sizing rooms, ordering flooring, painting walls, or measuring a yard.
Measurement unit
Both dimensions use the same unit. Switch the unit at the top if you measured in inches, yards, meters, or centimeters.
Square feet
252
18 × 14 ft
For flooring or paint, add 5–10% to the area for cuts, edges, and waste.
Examples
Living room 18 × 14 ft
= 252 sq ft
Kitchen 12 × 10 ft
= 120 sq ft
Backyard 60 × 40 ft
= 2,400 sq ft (≈ 0.055 acres)
Wall 8 ft × 12 ft
= 96 sq ft
How it works
Both length and width are converted to feet, then multiplied. The result in square feet is converted to square yards, square meters, and acres using fixed factors.
Area · L × W = square feet
1 sq yd = 9 sq ft · 1 sq m ≈ 10.764 sq ft · 1 acre = 43,560 sq ft
Frequently asked questions
Multiply length by width, with both numbers in feet. If you measured in inches, divide each measurement by 12 first. The calculator does this for you when you choose a unit.
Break the room into rectangles, calculate the square footage of each, and add them together. For an L-shaped room, that's two rectangles; for a more complex shape, more.
Add 5–10% to the room's square footage to cover cuts, mistakes, and future repairs. For diagonal patterns or busy patterns, add 10–15%. Your flooring's box label lists how many square feet it covers.
43,560 square feet. The calculator shows acres only when the area is a meaningful fraction of one — small rooms won't display the acre value because rounding makes it useless.
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