Concrete Stairs Calculator
Approximates the flight as a stack of rectangular tread prisms for budgeting only.
Step 1: Units
Step 2
Enter project measurements
Use decimals if needed (e.g. 3.5).
Step 3
How to use this calculator
Enter count of treads, full stair width, horizontal run per tread, and average concrete thickness per tread.
What the math is doing
Volume ≈ steps × width × run × thickness.
Frequently asked questions
Landings?
Add landing volumes separately.
Stringer walls?
Include if monolithic with treads.
Precast treads?
Use supplier piece counts instead.
Handrails?
Not part of concrete volume.