Roofing Calculators — Pitch, Rafters, Shingles & Cost
Everything a re-roof needs, chained together: read the pitch, get the area multiplier that turns footprint into roof surface, order the rafter stock, count the shingle bundles with an honest waste factor, and sanity-check the quote with a national cost band before you sign.
More Roofing Calculators
Roof Pitch Calculator
Enter rise and run — get pitch ratio, angle in degrees, slope percentage, the multiplier for roof area, and the pitch chart from 1/12 to 12/12.
Rafter Length Calculator
Enter building span, pitch, and overhang — get the pitched rafter length per side, the run it covers, and a cutting allowance note.
Shingle Calculator
Enter roof footprint and pitch — get roof area, squares of shingles, 3-bundle bundles with waste, and the weight you'll be hauling to the dump.
Roofing Cost Calculator
Roof replacement cost by material, pitch, tear-off, and stories — a low/high band built from 2026 national averages, with the honest caveat to get local quotes.