Roofing and drainage
Roofing calculator, Roof pitch calculator, Rafter length calculator, Roof shingle calculator.
Gutter calculator
Estimate outputs: Linear length, Whole pieces, Downspouts. Adjust Eave length, Number of gutter runs, Stock piece length to match your project.
Metal roofing calculator
Estimate outputs: Roof panels, Total board length, Area. Adjust Slope length, Eave length, Effective panel width to match your project.
Roof shingle calculator
Estimate outputs: Area, Area with allowance, Whole bundles. Adjust Length, Width, Roof slope factor to match your project.
Rafter length calculator
Estimate outputs: Rafter length, Rise to ridge. Adjust Building span, Horizontal overhang, Roof angle to match your project.
Roof pitch calculator
Estimate outputs: Roof angle, Slope, Slope factor. Adjust Roof rise, Roof run to match your project.
Roofing calculator
Estimate outputs: Area, Roof panels. Adjust Length, Width, Roof pitch to match your project.
No matching calculators
Choose a material, enter the measurements and check the result against the supplier’s specifications.
Roof calculations assume a simple rectangular surface or equal pitch slopes. Include overhangs in the entered plan dimensions; check overlaps and effective coverage.