Staircase Concrete Calculator
Waist slab + steps concrete for a straight flight.
Each step is a triangular prism riding the waist slab — together a 12-step flight ≈ 1 m³. Check rise 150–180, tread ≥ 250, and 2R+T ≈ 600–640 mm for comfortable stairs while you're here.
Formula
Staircase Concrete Calculator is a free staircase concrete for civil engineers, contractors and quantity surveyors — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Staircase Concrete Calculator
Waist slab + steps concrete for a straight flight. The calculation implements V = slope×W×t_waist + n×(½·r·t)×W (IS 456; NBC stair geometry). Each step is a triangular prism riding the waist slab — together a 12-step flight ≈ 1 m³. Check rise 150–180, tread ≥ 250, and 2R+T ≈ 600–640 mm for comfortable stairs while you're here.
How to use Staircase Concrete Calculator
- 1Enter Number of risers.
- 2Enter Riser height in mm.
- 3Enter Tread depth in mm.
- 4Enter Flight width in m.
- 5Read Concrete volume, Flight slope length instantly — no submit button needed.
- 6Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Staircase Concrete Calculator?
- ✓Implements the standard formula — V = slope×W×t_waist + n×(½·r·t)×W
- ✓Reference cited on-page: IS 456; NBC stair geometry
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Staircase Concrete Calculator use?+
It computes V = slope×W×t_waist + n×(½·r·t)×W, per IS 456; NBC stair geometry. The formula is displayed under the result.
What should I keep in mind when using this calculator?+
Each step is a triangular prism riding the waist slab — together a 12-step flight ≈ 1 m³. Check rise 150–180, tread ≥ 250, and 2R+T ≈ 600–640 mm for comfortable stairs while you're here.
Does it include wastage?+
Yes — standard wastage/bulking factors are built in and stated in the formula line, so the quantity is an orderable number, not a bare geometric volume.
Is the Staircase Concrete Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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