Roof Pitch Calculator

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Calculate roof pitch angle, percentage and ratio from rise and run.

RoofingWorking calculatorMobile friendly

Roof Pitch CalculatorVisual reference for this tool.

Use this calculator for quick estimating and planning. Verify project-specific assumptions before final procurement or design.

Rise (m)

Run (m)

Roof Length (m)

Allowance (%)

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Note—

Calculations run locally in your browser; no backend is required.

Pitch Angle = arctan(Rise / Run)

Rise 1.5 m and run 4 m gives pitch angle about 20.56°.

For structural, electrical, code-compliance or safety-critical work, use this as a preliminary estimate and verify with a qualified professional.

Short answers for common estimation questions.

They are estimation values. Site conditions, product specifications and local practice can change final quantities.

Yes. Civil Micros is designed to work on mobile browsers without a backend.

Continue your calculation workflow.