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BuildRight
Roof area converted to roofing squares, then to bundles at the standard 3-per-square rate.
Roofers measure in 'squares' — one square covers 100 square feet of roof. Standard 3-tab shingles use 3 bundles per square; some architectural shingles use 4 bundles per square, so check your specific product.
A sloped roof's actual surface area is larger than the home's footprint — this calculator expects the actual roof surface area (accounting for pitch), not the ground-level building footprint.
Bundles needed
66
Standard 3-tab shingles use 3 bundles per 100 sq ft 'square' — architectural shingles sometimes use 4.
What you entered
Roof area with 10% waste
2000 × 1.10= 2200 sq ftConvert to roofing squares (1 square = 100 sq ft)
2200 ÷ 100= 22 squaresBundles (3 bundles per square is standard)
22 × 3= 66 bundlesResult
Bundles needed: 66
A 2000 sq ft roof needs about 66 bundles of shingles (22 roofing squares).