Free roofing calculators
for contractors and homeowners
Fast, accurate tools for estimating materials, labor, and costs. No sign-up — just the numbers you need on the job.
Most popular
Roofing squares calculator
Calculate squares and shingle bundles from roof dimensions and pitch.
Use calculator →Roof pitch calculator
Convert pitch to degrees, find slope multiplier, and calculate rafter angles.
Use calculator →Underlayment calculator
How many rolls of felt or synthetic underlayment you need.
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