Free Roofing Calculator
Roof Shingle Calculator
Estimate roofing squares and the number of shingle bundles required for a roofing project.
Roof Shingle Calculator
Many asphalt shingle products use about 3 bundles per roofing square, but always check the manufacturer's coverage.
Estimate shingle quantities
Enter the roof area and waste allowance to calculate roofing squares and estimated bundles.
How many shingles do I need?
Start with the total roof surface area, convert that area into roofing squares, add an allowance for cuts and waste, and then multiply by the number of bundles required per roofing square.
Why add extra material?
Roofing materials may be lost to cuts, valleys, hips, ridges, starter courses and installation waste. More complicated roof shapes can require a larger allowance.
Don't know your roof area yet?
Use the Roof Area Calculator first to estimate the roof surface from your building footprint and pitch.
Calculate Roof Area