Roofing tools
Roofing calculators
Translate roof geometry into pitch, surface area, rafter lines, and material quantities. Start with dimensions and pitch before estimating packaged roofing products.
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Roofing calculators
Open a calculator to see its formula, assumptions, worked example, and related planning tools.
Roof Pitch CalculatorConvert rise and run into pitch ratio, slope percentage, angle, and rafter length.ReadyRoof Area CalculatorEstimate sloped roof surface area from plan dimensions and pitch.ReadyRoofing Material CalculatorPlan shingles, underlayment, ridge caps, and roofing waste.ReadyRafter CalculatorEstimate common rafter length from span, run, and pitch.Ready
Planning guidance
Before you calculate
- Use separate measurements for roof sections with different pitches.
- Add overhangs, hips, valleys, and dormers only when the selected calculator supports them.
- Treat structural sizing and code compliance as separate professional tasks.
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