Shingles Needed for a 2,000 sq ft Gable Roof (4/12 Pitch)

For a 2,000 sq ft gable roof (4/12 pitch), you need approximately 64 bundles of asphalt shingles, which equals 21.08 roofing squares (1 square = 100 sq ft). The actual roof surface area is 2,108.19 sq ft after applying the 4/12 pitch multiplier of 1.05 and the gable roof geometry factor. You will also need 85 lb boxes of roofing nails and 6 rolls of felt underlayment. Use our Roof Shingle Calculator to adjust dimensions and compare material options.

For a 4/12 roof pitch (4 inches of rise per 12 inches of horizontal run), the pitch multiplier is 1.05. This means the actual sloped roof area is 105.4% of the building footprint. For a 50×40 building footprint of 2000 sq ft, the sloped roof area becomes approximately 2,108.19 sq ft for a gable roof. Use our Roof Pitch Calculator to find the pitch multiplier for any slope.

A 50 ft by 40 ft gable roof with a 4/12 pitch requires 21.08 squares of shingles (1 square = 100 sq ft). Roofing materials are priced by the square. Standard 3-tab asphalt shingles cost $90 to $110 per square, while architectural shingles cost $130 to $180 per square. For this roof, material cost would range from $1,897 to $3,794 for shingles alone, plus underlayment, nails, and labor.