Roofing calculators
Pitch, shingles, squares, bundles and gutters. Every calculator on this page returns a purchase ready quantity with the waste allowance shown and the working visible.
Roofing Calculator
Calculate roof area, roofing squares, shingle bundles, starter strip, ridge cap, underlayment and nails from your building.
Open calculator →Roof Pitch Calculator
Convert roof pitch to degrees, slope percentage and the pitch multiplier. Enter rise and run, an angle, or a pitch ratio, and get.
Open calculator →Gutter Calculator
Work out gutter length, the right gutter and downspout size for your roof area, how many downspouts you need, and the material.
Open calculator →