Architect Tools

Concrete · Calculator

Concrete Stairs Calculator

Estimate concrete volume for a straight reinforced-concrete stair flight.

Project inputs

Enter your project values, then press Calculate.

How this calculator works

Estimate concrete volume for a straight reinforced-concrete stair flight.

approx. volume = sloping waist slab + triangular step prisms

How to use the Concrete Stairs Calculator

1. Enter project inputs

  • Total rise (m)
  • Total run (m)
  • Stair width (m)
  • Waist thickness (m)
  • Number of risers (pcs)
  • Waste allowance (%)

2. Review the results

  • Waist slab volume
  • Step volume
  • Total concrete
  • Order volume

3. Check the calculation

The calculator uses the following core relationship:

approx. volume = sloping waist slab + triangular step prisms

Estimating note: Actual material quantities can vary with site conditions, detailing, product dimensions, installation method, and waste.

Concrete Stairs Calculator FAQ

What does the Concrete Stairs Calculator calculate?

Estimate concrete volume for a straight reinforced-concrete stair flight.

What information do I need to use the Concrete Stairs Calculator?

The calculator uses inputs such as Total rise (m), Total run (m), Stair width (m), Waist thickness (m), and Number of risers (pcs). Use values from your drawings, measurements, product data, or project specifications.

How should I use the results from the Concrete Stairs Calculator?

Use outputs such as Waist slab volume, Step volume, Total concrete, and Order volume for estimating and cross-checking. Before purchasing or construction, confirm the dimensions, units, waste factors, supplier packaging, and project specifications.