calcs.homes
calcs.homes
Enter your step count, riser height, tread depth, and stair width to find how much concrete a solid stair pour needs.
Estimate only — excludes a separate footing below the stairs, if your design needs one.
A solid concrete staircase has a stepped cross-section — each step is a smaller rectangle stacked on the one below it. Cross-sectional area works out to riser × tread × steps × (steps + 1) ÷ 2, which we multiply by stair width for total volume. This doesn't include a separate footing below the stairs — add that with the concrete calculator's footing mode if your design calls for one.
It depends on the number of steps, riser height, tread depth, and width — enter your specific stair dimensions above for an exact cubic yard figure.
Most codes require a footing below grade, sized for your local frost depth, to keep the stairs from heaving or settling — check with your local building department.