Roofing Calculator
Calculate shingles, squares, and materials needed
Total Roofing Squares Needed
12.3
1 square = 100 sq ft
Roof Area (pitched)
1118 sq ft
Shingle Bundles Needed
3-Tab Shingles
37
bundles (3 per square)
Architectural Shingles
50
bundles (4 per square)
Roofing Facts
🏠A 'roofing square' equals 100 sq ft - industry standard since the 1800s
📐6:12 pitch is most common - rises 6 inches for every 12 inches horizontal
🌧️Asphalt shingles last 20-30 years; metal roofs can last 50-70 years
🔥Cool roofs reflect sunlight and can reduce cooling costs by 10-30%
🌪️Hurricane-rated shingles can withstand winds up to 130 mph
🏔️Slate roofs in Europe have lasted 400+ years with minimal maintenance
🌱Green roofs can last 40+ years and reduce urban heat island effect
💰The average roof replacement costs $8,000-$15,000 in the US