Staircase Calculator
Staircase comfort depends on consistent riser height. This calculator divides total rise by the number of steps to give the riser height per step, helping you stay within building code limits.
What Is Staircase?
Staircase riser height is the vertical distance from one tread to the next, calculated by dividing total rise by the number of steps. Building codes typically recommend 150–190 mm per step for safety and comfort. Accurate riser heights prevent tripping hazards.
Example
Formula: Total rise / Steps = 3000 mm / 15 steps = 200 mm
Enter total rise and steps count, then the result will be in mm or cm.
Tip: Choose your result unit on the right before calculating.
Step-by-step calculation
- Enter total rise and number of steps.
- Select the result unit you want (mm or cm).
- Calculate to see rise per step and steps in the selected unit.
How this is calculated
Steps = total rise divided by chosen riser height (kept within about 150–200 mm); going = number of treads times tread depth. We also estimate concrete volume from the stair geometry.
Sources: IS 456:2000 (stair design limits); National building code stair dimensions.
FAQ
- How do I calculate riser height by hand?
- Divide total rise by number of steps. Example: 3000 mm / 15 steps = 200 mm.
- What is the formula for riser height?
- Riser = Total rise / Steps. Keep it between 150–190 mm for comfort.
- Open riser vs closed riser
- Open risers have gaps; closed risers are solid. Both use the same height calculation.
- What units should I use?
- Use mm or cm for rise and count for steps.
- Can I use this for a deck stair?
- Yes. Enter deck height and number of steps to design safe stairs.