Concrete Stairs Calculator
Estimate concrete for steps and stairs
Total number of steps
Width of the stairs
Height of each step
Depth of each step
Total Concrete
—
cu yd
80 lb Bags
—
bags
Estimated Cost
—
USD
Disclaimer: Results are estimates based on standard formulas. Not a substitute for professional advice from a licensed contractor, engineer, or architect. Verify all calculations before making purchasing or construction decisions.
How to Use This Calculator
Building concrete stairs requires precise volume calculations. Our calculator sums up all step volumes to give you an accurate estimate.
- Determine number of steps needed
- Set riser height (7" standard) and tread depth (11" standard)
- Enter the stair width
- Add 10% extra for form irregularities
AI Insights
Smart analysis for your project
Smart Estimates
Our AI cross-references material costs, regional pricing, and project complexity for more accurate estimates.
Waste Optimization
AI-calculated waste factors based on project type, not flat percentages. Saves 5-15% on material costs.
Best Practices
Recommendations derived from building codes, contractor data, and thousands of completed projects.
Calculation Formula
Volume per step = Width x Tread x Riser
Total = Sum of all step volumes / 27
Frequently Asked Questions
What are standard step dimensions?
Standard residential steps: 7" riser and 11" tread (7-11 rule). Max riser height is 7.75" per IRC code.
How much concrete for 4 steps?
Four steps (4ft wide, 7" riser, 11" tread) need approximately 0.5 cubic yards or about 23 bags of 80lb concrete.