Roofing Calculator
Estimate roof area, roofing material, and shingle bundles for gable, shed, or custom roof projects.
Roofing Calculator
This calculator auto-updates when values change.
Roof area
1,180.58 sq ft
Area with waste
1,298.64 sq ft
Roofing squares
12.99 squares
Bundles needed
39
Disclaimer: This property and construction calculator provides an estimate only. Actual material requirements can vary based on site conditions, product specifications, installation method, waste, and local building requirements. Confirm quantities with your contractor or supplier before ordering.
About This Roofing Calculator
This roofing calculator estimates roof surface area from house dimensions and roof pitch, then calculates material and shingle bundle quantities.
It is useful for early planning, budgeting, and checking approximate material needs before getting a professional roofing quote.
How to Use This Calculator
- 1
Choose roof type
Use gable, shed, or custom roof area depending on the information you have.
- 2
Enter dimensions and pitch
Add house length, width, and pitch rise over 12 for standard roof calculations.
- 3
Set waste and bundle coverage
Use waste for cuts and overlaps, and enter bundle coverage from your shingle product.
- 4
Review roof area and bundles
Use the calculated area and rounded bundle count for planning.
Frequently Asked Questions
How does roof pitch affect area?v
Steeper roofs have more surface area than the flat footprint, so the calculator applies a pitch multiplier.
How many square feet does a shingle bundle cover?v
Many asphalt shingle bundles cover about 33.3 square feet, but always check the product label.
Is this safe for final roofing orders?v
Use it for planning only. Roofing orders should be confirmed by a qualified roofer or supplier.