One roofing square = 100 sq ft
Roofing materials are commonly estimated in squares, with one square covering 100 square feet of roof surface.
Free contractor tool
Roofing & Shingle Calculator
Estimate roof surface area, roofing squares, shingle bundles and underlayment without doing pitch-factor math by hand.
Roof areaSquares + bundlesPitch + waste
Enter the roof
Use a simple footprint + pitch or enter measured roof surface area directly for complex roofs.
Use the actual shingle manufacturer's bundles-per-square and underlayment coverage. Valleys, hips, ridges, starter, flashing and complex roof sections require separate takeoff.
Pitch increases surface area
The footprint mode applies the geometric pitch factor to the horizontal roof projection.
Complex roofs need sections
Dormers, intersecting roofs, valleys, hips and different pitches should be measured as separate roof planes when possible.