▭ Footprint + Pitch
📐 Known Roof Area
Building footprint
Materials & waste
You'll need
0 sq
roofing squares, waste included
Raw roof area0 sq ft
With waste factor0 sq ft
Shingle bundles0
Underlayment rolls0
Roofing nails0 lb
Estimated installed cost
$0
$0
1 roofing square = 100 sq ft. Underlayment assumes 4-square rolls with 2 in. overlap; nail estimate assumes ~2.5 lb per square.
Footprint + pitch
Multiplies your building's flat footprint by a pitch multiplier to account for the roof's slope.
Known roof area
Already have the roof area from a plan or measurement? Enter it directly and skip the pitch math.
Roofing squares
Roofers price and order material in "squares" — each square covers 100 sq ft of roof surface.
Waste factor
10% is typical for simple gable roofs; complex roofs with hips, valleys and dormers may need 15–20%.