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Concrete Stairs Volume Calculator

Use this calculator to estimate the volume of concrete required for building stairs. By entering the number of steps, rise, tread, and width, you can quickly determine how much concrete is needed for casting staircases, helping with both planning and budgeting.

Estimate Concrete for Staircase Pour

Input Fields
n
t
in
r
in
w
in
If enabled, the result will update automatically when you change any value.

Concrete Volume Formula for Stairs

Formula
$$c = \left( \frac{n \cdot \frac{t}{12} \cdot n \cdot \frac{r}{12}}{2} + \frac{n \cdot \left( \frac{t}{12} \cdot \frac{r}{12} \right)}{2} \right) \cdot w \cdot 0.037037$$

  • $$n$$ β€” number of steps
  • $$t$$ β€” tread length (inches)
  • $$r$$ β€” riser height (inches)
  • $$w$$ β€” width (inches)
  • $$0.037037$$ β€” conversion factor to cubic yards


This formula combines the area of triangular and rectangular components of the steps, converting all dimensions from inches to feet before applying the conversion to cubic yards. It’s commonly used in residential and commercial stair construction to accurately determine how much concrete is needed, avoiding under- or overestimation.

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