Stair Concrete Volume Calculator

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Estimate stair waist slab concrete volume for preliminary quantity takeoff.

StairsWorking calculatorMobile friendly

Stair Concrete Volume CalculatorVisual reference for this tool.

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

Flight Slope Length (m)

Stair Width (m)

Waist Thickness (m)

Step Allowance (%)

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

Approximate Volume = Slope Length × Width × Waist Thickness × Step Allowance

A 5.63 m flight, 1.2 m wide and 150 mm waist slab has about 1.01 m³ waist volume before steps.

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.