Estimate the materials needed for your roofing project. All dimensions are in feet.
Total Roof Area:
0 sq ft
Shingle Bundles Needed:
0 bundles
Tar Paper Rolls Needed:
0 rolls
OSB/Plywood Sheets Needed:
0 sheets
Estimate the materials needed for your flooring project. All dimensions are in feet.
Total Floor Area:
180 sq ft
Flooring Material Needed:
189 sq ft
Multiply the project footprint by the roof or floor slope factor, then add a waste allowance to estimate total material area.
Key formula: material_needed_sq_ft = length_ft * width_ft * pitch_factor * (1 + waste_percent/100)
material_needed_sq_ft = length_ft * width_ft * pitch_factor * (1 + waste_percent/100)
Example inputs: Roof 30 ft × 20 ft, Medium Slope (pitch factor 1.15), Roofing waste 10%.
These are planning estimates based on typical coverage values. Check product specifications and add contingency for on-site conditions.
Yes. Waste accounts for cuts, overlaps, and mistakes—common recommendations are about 5% for flooring and 10% for roofing.
Yes. Choose the pitch factor that best matches your roof slope or consult a roofer for an accurate slope multiplier.
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