Free roofing
calculators.
Pitch, roof area, squares, bundles and a few materials. Type your numbers and the math runs right here in your browser, with the formula shown.
Pick a calculator
Free, no sign-up. Results update while you type.
Roof pitch calculator
Rise per 12, rise and run, or an angle: get the pitch, the angle in degrees, the percent grade and the pitch multiplier.
Open the calculatorRoof area & squares
Footprint and pitch to roof area and squares, squares to order with your waste %, and shingle bundles.
Open the calculatorUnderlayment, drip edge & starter
Rolls, pieces and bundles from your own lengths and the coverage printed on your products.
Open the calculatorYour numbers
The calculators only do the math on what you type. Anything that is an assumption, like bundles per square or the coverage per roll, is a box you can change.
The math, shown
Every result has its formula written under it in plain words, with your numbers in it, so you can check it or redo it by hand.
Need the lengths?
For a roof you haven't measured, RoofReport measures it from the address and lists every line in feet.
See a sample reportGet exact measurements from an address.
Type an address and RoofReport measures the roof from aerial data: area, squares, pitch, eaves, rakes, ridges, hips and valleys.