Roofing Calculators — Construction
Roof framing and material take-off: rafter and ridge length, hip and valley rafters, birdsmouth cuts, gambrel geometry, and metal roof cost. Pitch drives every one of these, so confirm the roof pitch before ordering anything.
All Roofing Calculators
Calculate birdsmouth cut with inputs, formulas, and instant results.
Calculate gambrel roof with inputs, formulas, and instant results.
Calculate hip and valley rafter with inputs, formulas, and instant results.
Calculate metal roof cost with inputs, formulas, and instant results.
Calculate rafter length with inputs, formulas, and instant results.
Calculate ridge length with inputs, formulas, and instant results.
Calculate roof area from pitch with inputs, formulas, and instant results.
Calculate roof pitch with inputs, formulas, and instant results.
Calculate roof shingle with inputs, formulas, and instant results.
Calculate roof waste factor with inputs, formulas, and instant results.
Calculate roofing sheathing count with inputs, formulas, and instant results.
Calculate shed roof dimensions, materials, and pitch from shed width and desired overhang.
Calculate snow load with inputs, formulas, and instant results.
Calculate soffit vent area with inputs, formulas, and instant results.
Calculate trusses, rafters, and sheathing
About Roofing Calculators
Roof framing and material take-off: rafter and ridge length, hip and valley rafters, birdsmouth cuts, gambrel geometry, and metal roof cost. Pitch drives every one of these, so confirm the roof pitch before ordering anything.
Whether you need to solve a one-time problem or verify your own calculations, these free tools cover the most common roofing scenarios. All results are computed in your browser — no data is sent to any server.
What You Can Calculate
This section includes 15 tools: Birdsmouth Cut Calculator, Gambrel Roof Calculator, Hip and Valley Rafter Calculator, Metal Roof Cost Calculator, Rafter Length Calculator, Ridge Length Calculator, Roof Area From Pitch Calculator, Roof Pitch Calculator, and 7 more. Each calculator is free to use with no signup required.