The easiest way is to measure the base of your house. Multiply the length by the width to get the base area in square feet. Roof pitch will be factored in to estimate true roof area.
Input your roof’s base area (in sq. ft), pitch, and the material you want. The calculator will estimate roof surface area and material needs.
Roofing companies usually charge labor, disposal, and profit on top of material costs. This calculator includes an estimated markup of 60% over material cost to reflect realistic contractor pricing.