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
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.