Home / Engineering Tools / Material Calculators
Staircase Calculator
How many steps for an 11 ft floor? Riser height, tread, space needed and concrete for straight and dog-leg staircases.
Loading the calculator… (JavaScript is needed)
About this calculator
Enter your floor height and stair type to get the number of steps, riser and tread sizes that are comfortable to climb, the space the stair needs and the concrete quantity.
How it's calculated
- Number of risers = floor height ÷ maximum riser (rounded up)
- Tread from the comfort rule 2R + T ≈ 25″
What is a comfortable riser height?
6–7 inches with a 10–11 inch tread.
Results are calculated from the values you enter using standard formulas. Download the PDF to keep a record. For certified testing, design or construction, talk to our engineers.
Need an engineer for your project?
Testing, design and construction across Azad Kashmir & Punjab. Call or WhatsApp us.