Roofing Calculators
Shingles, bundles, and gutters — sized off your roof's footprint and pitch.
- Gutter CalculatorAdd up your roof's eaves and this works out the gutter to buy, plus the downspouts and hangers to hold it.
- Roofing CalculatorRoofing is measured in squares — 100 square feet each. Enter your roof's footprint and pitch and this gives the squares, the shingle bundles, and the true (sloped) roof area.
- Shingle CalculatorShingles are sold by the bundle, and it takes about three bundles to cover a roofing square (100 sq ft). Enter your roof area for the bundles to buy, with a waste allowance.
- Metal Roof CalculatorMetal roofing goes on in panels, each covering its exposed width times its length. Enter your roof area and the panel size for the number of panels, with a waste allowance.
- Roof Area CalculatorA pitched roof covers more surface than the ground beneath it. Enter your building's footprint and the roof pitch for the true sloped area — in square feet and in roofing squares.
- Roof Pitch CalculatorRoof pitch is how steep the roof is — the rise over a run. Enter the rise and run and this gives the pitch in the usual x-in-12 form, plus the angle, the slope multiplier, and the percent grade.