Cubic feet
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Concrete Stairs Calculator
Concrete Stairs calculator
Calculate concrete for poured steps and stairs. Cubic yards, bags, ready-mix loads and weight — with a waste margin built in, nothing leaves your browser.
Dimensions
FIG. 01Volume ÷ 27 = cubic yards. Pros order to the nearest ½ yard and add a waste margin — running short mid-pour risks a cold joint.
You need
—cu yd
Order to nearest ½ yd → — · —
Cubic meters
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80 lb bags
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60 lb bags
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Est. weight
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Best buy
see above
How this is calculated
A solid poured staircase is a stack of rectangular blocks: each step adds a block whose height grows with the step number. This calculator sums those blocks for your width, rise, run and step count — no hand geometry needed.
cubic yards = volume in cubic feet ÷ 27 × (1 + waste%)
For the full method and sources, see the methodology page. Comparing buying options? Use the bags-vs-ready-mix calculator.
FAQ
How do I calculate concrete for stairs?
A solid poured staircase is a stack of rectangular blocks: each step adds a block whose height grows with the step number. This calculator sums those blocks for your width, rise, run and step count — no hand geometry needed.
How much concrete do stairs use?
More than people expect, because the solid mass behind the treads adds up fast. A typical 3-step, 4-ft-wide stoop can use roughly half a cubic yard — often right at the bag-vs-truck breakeven.