Roof squares
calculator.
Footprint and pitch in, roof area and squares out. Add your waste % and your shingle's bundles per square to get what to order.
Your roof
Results
- Roof area
- —sq ftRoof area = footprint × pitch multiplier
- Squares
- —Squares = roof area ÷ 100 (1 square = 100 sq ft)
- Squares to order
- —Squares to order = squares × (1 + waste %), rounded up to the next 1/3 square
- Bundles
- —Bundles = squares to order × bundles per square, rounded up to a whole bundle
Assumes one pitch over the whole footprint. Ridge cap, starter, hip and valley materials are not included.
How the squares are worked out
What a square is
One roofing square is 100 square feet of roof surface. A 2,000 sq ft roof is 20 squares.
Footprint × multiplier
From above, a roof covers its footprint. The slope makes the real surface bigger by the pitch multiplier. Roofs with several pitches, dormers or more than one level need each part worked out on its own.
Waste and rounding
Squares to order are rounded up to the next 1/3 square, and bundles up to the next whole bundle. The waste % is yours to choose for each roof.
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