A roofing square is 100 square feet of roof surface, approximately 9.29 square meters. For example, 2,000 square feet equals 20 roofing squares before adding any waste allowance.

No. A sloped roof usually has more surface area than its horizontal footprint. Pitch, overhangs and separate roof sections affect the total. Calculate each relevant section and combine the results.

Waste depends on roof shape, valleys, cuts, material layout and the product. There is no single percentage that suits every roof. Use your supplier’s or contractor’s recommendation and keep the waste allowance separate from measured area.

Yes. Enter rise and run in the same unit. A rise of 0.5 meters and a run of 1 meter produces the same 6:12 pitch as 6 inches of rise over 12 inches of run.

No. Calculator results are planning estimates. Site conditions, product specifications, local labor rates, removal, access and other project requirements can change the final quantity or price.

No. RooferTX is the site’s name. Roofing geometry works wherever consistent measurements apply. Material requirements, costs and building rules must be checked for your specific location.