Calculate sloped roof area from roof footprint, roof pitch, pitch angle, or known flat area. Estimate roof squares, shingle bundles, waste, underlayment, roofing material cost, labor cost, and total project cost.
Roof dimensions mode:
The calculator estimates the flat roof footprint from length and width, adds overhangs, then multiplies by the pitch slope factor.
Known flat area mode:
The calculator multiplies your known flat roof area by the slope factor to estimate sloped roof area.
Known sloped area mode:
The calculator uses your known roof surface area directly, then estimates squares, bundles, waste, and cost.
Roofing estimate:
The calculator estimates roof squares, shingle bundles, underlayment rolls, material cost, labor cost, tear-off cost, and total cost.
A roof pitch area calculator helps convert a flat roof footprint into actual sloped roof area. This is useful for estimating shingles, metal roofing, underlayment, sheathing, roofing squares, roof coating, and roofing labor.
It can help calculate sloped roof area, slope factor, roof squares, bundles, waste, material cost, labor cost, tear-off cost, and total estimated roofing cost.
Your result shows flat roof area, sloped roof area, roof area with waste, roof squares, shingle bundles, underlayment rolls, pitch angle, slope factor, material cost, labor cost, tear-off cost, and estimated total cost.
Calculate the flat roof footprint first, then multiply it by the roof pitch slope factor. For example, a 6/12 pitch has a slope factor of about 1.118.
A roof slope factor converts flat horizontal roof area into actual sloped roof surface area.
One roofing square equals 100 square feet of roof area.
Many asphalt shingles use about 3 bundles per square, but bundle coverage varies by product. This calculator lets you enter the bundle coverage.
No. It is an estimate. Real roof area can vary by valleys, hips, dormers, overhangs, multiple roof sections, roof complexity, waste, product coverage, and measurement method.