Concrete Steps Calculator
Estimate solid concrete stair volume, total rise and run, concrete bags, landing material, placed weight and ready-mix cost.
Default project preview
1.09 yd³
Concrete bags
49
Total rise
2.33 ft
Total stair run
3.67 ft
Top surface area
30.7 ft²
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Input and output guide
What each value means
The labels and units below are part of this calculator’s visible methodology. Replace every default with measurements or product data from the actual project.
Stair width
Enter this project assumption in ft. The current imperial default is 4 ft.
Number of risers
Enter this project assumption in a unitless value. The current imperial default is 4. Minimum: 1.
Tread depth
Enter this project assumption in in. The current imperial default is 11 in.
Riser height
Enter this project assumption in in. The current imperial default is 7 in.
Landing length
Enter this project assumption in ft. The current imperial default is 4 ft. Minimum: 0.
Landing thickness
Enter this project assumption in in. The current imperial default is 4 in. Minimum: 0.
Extra allowance
Enter this project assumption in %. The current imperial default is 10 %. Minimum: 0. Maximum: 50.
Concrete yield per bag
Enter this project assumption in ft³. The current imperial default is 0.6 ft³.
Ready-mix price
Enter this project assumption in per yd³. The current imperial default is 165 per yd³. Minimum: 0.
Price per bag
Enter this project assumption in a unitless value. The current imperial default is 7. Minimum: 0.
How to read the outputs
Concrete bags
0.6 ft³ yield each. Default preview: 49.
Total rise
7 in per riser. Default preview: 2.33 ft.
Total stair run
tread segments only. Default preview: 3.67 ft.
Top surface area
steps and landing. Default preview: 30.7 ft².
Placed weight
approximate wet concrete. Default preview: 4,404 lb.
Ready-mix cost
bagged option $343.00. Default preview: $179.63.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Solid stair volume = width × tread depth × riser height × n(n + 1) ÷ 2. Landing volume is added, then the allowance is applied and bags are rounded up.
Reviewed project guidance
How to use this estimate in a real project
Last reviewed: July 30, 2026
Use this calculator to estimate concrete volume for a straight set of solid steps and landing from tread, rise, width and step count. It supports material ordering but does not design reinforcement, foundations or safe stair geometry.
Calculation steps
- 1Convert tread and rise dimensions to consistent units.
- 2Sum the increasing step layers across the stair width.
- 3Add any landing or support volume.
- 4Apply waste and convert to full bags or ready-mix volume.
Worked numerical example
For four steps 4 ft wide, with 11 in treads and 7 in rises, the stepped volume is found by summing each successive rectangular layer. Adding a 4 ft × 4 ft × 4 in landing and 10% waste produces the order volume.
Purchasing and rounding
Ready-mix is ordered by volume and bagged mix by whole bags. Small stepped forms often have higher handling loss than simple slabs.
Interpret the result
The volume grows faster than step count because lower portions support all higher treads. A landing can represent a large share of the total.
Page-specific assumptions
- Solid monolithic step geometry.
- Uniform tread and rise.
- Rectangular landing.
- No voids or lightweight fill deductions.
Common mistakes
- Multiplying one tread prism by the step count.
- Ignoring landing thickness.
- Using finish dimensions without form tolerances.
- Treating the volume estimate as structural design.
Primary and technical references
BuildMeter provides planning estimates, not engineering, architectural, electrical, mechanical, plumbing, permit or code approval. Review the methodology and verify final decisions with product documentation and qualified professionals.
FAQ
Concrete Steps Calculator questions
Why does stair volume use a triangular series?+
Each tread segment supports a different concrete height. Adding those increasing step prisms produces the n(n + 1) ÷ 2 factor.
Does the calculator check stair-code geometry?+
No. Riser height, tread depth, landings, handrails and guards must meet the rules that apply to the project.
Are these steps assumed to be solid?+
Yes. Hollow, suspended or precast stair systems use different quantities and engineering.