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Calculator
Calculate the concrete volume required for staircases including steps, waist slab, and landings. Get accurate m³ estimates for staircase pours in Zanzibar.
Instant estimate
0.480 m³ steps + 0.900 m³ waist
Rise per step: 0.200 m
Run per step: 0.267 m
Waist slab thickness: 150 mm
Recommended grade: C20
Planning estimate only. Confirm dimensions from architectural drawings.
Get WhatsApp QuoteHow to Calculate
Steps Volume = (Rise × Run × Width × Steps) / 2
Waist Slab = Slope Length × Thickness × Width
Calculate individual step volume using the triangle formula, then sum for all steps. The waist slab follows the slope of the staircase. Add both volumes together and include 5–10% waste.
Step volume
Triangle area × width per step
Waist slab
Follows hypotenuse of rise and run
Typical thickness
150–200mm waist slab for residential stairs
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