Roofers measure roofs in "Squares" where 1 Square = 100 square feet of roof area. Standard architectural shingles require 3 bundles per square.
Roofing Calculator
Calculate actual roof surface area, roofing squares, shingle bundles, and underlayment rolls.
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📊 Calculation Results
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Total Roofing Squares
📐 Mathematical Formula & Standard
Ground Area = Base Length ft × Base Width ft
Roof Area = Ground Area × Pitch Multiplier × (1 + Waste % / 100)
Roofing Squares = Roof Area ÷ 100
Shingle Bundles = Ceiling(Roofing Squares × 3)
Roof Area = Ground Area × Pitch Multiplier × (1 + Waste % / 100)
Roofing Squares = Roof Area ÷ 100
Shingle Bundles = Ceiling(Roofing Squares × 3)
📖 Comprehensive Guide & Pro Estimating Tips
❓ Frequently Asked Questions
How many shingle bundles in a square? ▼
There are 3 standard bundles of asphalt shingles in 1 roofing square (100 sq ft).
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