Roofing

Material quantity calculators using standard densities and coverage rates, with sensible waste margins.

Roof Pitch Calculator

Convert roof rise and run into pitch (X-in-12), angle in degrees, slope percentage and the rafter length multiplier.

Calculate true sloped roof area from building footprint and pitch, plus square feet, roofing squares and a waste allowance.

Calculate asphalt shingle bundles and roofing nails needed from roof area and a waste allowance, using standard trade conventions.

Calculate common rafter length from run and pitch (or rise), including the overhang converted to its along-the-slope length.