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Area Calculator
Open the related 5iBuild calculator.
Open tool →🏠 Roof Pitch Calculator
Calculate pitch ratio, slope percentage and roof angle.
Enter your values
Results are preliminary estimates. Use project-specific specifications, drawings, product data and local requirements for final decisions.
Result
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Calculator guide
How this calculator works
Slope % = Rise ÷ Run × 100; Angle = arctan(Rise ÷ Run)
Formula
Slope % = Rise ÷ Run × 100; Angle = arctan(Rise ÷ Run)
Important limitation
Roof design also depends on climate, covering, drainage and local requirements.
Related tools
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Important: 5iBuild calculations are general estimates. Verify drawings, specifications, product data, local rates and applicable codes or regulations before construction or procurement.