Siding Calculator: Squares & Panels Needed
Your numbers
House perimeter
ft
Wall height
ft
Gable area
sq ft
Triangles above the wall: ½ × base × height, each end.
Doors
Each ≈ 21 sq ft
Windows
Each ≈ 15 sq ft
Garage doors (area)
sq ft
Typical double: 112 sq ft.
Siding type
Vinyl clapboard, 12 ft piece, 8 in exposure (8 sq ft)
Fiber cement lap, 12 ft, 7.25 in exposure (7.25 sq ft)
Wood lap, 12 ft, 8.3 in exposure (8.3 sq ft)
Vinyl dutchlap, 12.5 ft, 10 in (10.5 sq ft)
Outside corners
Waste
%
Price per square
$
Calculate
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