Roofing Calculator
rise
run (12)
footprint
What to measure
Footprint area
sq ft
Ground-level area under the roof, not the sloped surface.
Roof pitch
/12
Rise per 12 in of run. A 6/12 roof rises 6 in per foot.
Waste factor
percent
10% for a simple gable, 15%+ for hips and valleys.
Roofing squares
19.68 squares
Show the work
Roofing Calculator
by Rule Calculator