Example 1 — Stairs between floors
- Total rise: 2.8 m
- Number of steps: 16
Step height: 17.50 cm
This sits within a common and comfortable practical range.
Stair step height
Enter total rise and the number of steps — see riser height and quickly check whether the stairs will feel comfortable.
Step height is one of the key comfort knobs — a quick check that your planned step count makes sense. Related: 3-4-5 ratio.
Results
Enter data and click Calculate.
How the results are calculated
Step height = total rise ÷ number of steps. A comfortable range is typically about 15–20 cm; with optional tread depth the calculator also shows the Blondel check 2h+s.
How to use this calculator
- Enter the total vertical height between the two levels.
- Add the planned number of steps.
- Read the height of a single step.
- If the result is too high or too low, change the number of steps and compare the options.
Example scenarios
Example 2 — Higher floor level
- Total rise: 3.0 m
- Number of steps: 17
Step height: 17.65 cm
A small change in the number of steps can noticeably improve stair comfort.
Example 3 — Lower staircase in a smaller building
- Total rise: 2.65 m
- Number of steps: 15
Step height: 17.67 cm
This is another example showing that a comfortable result often comes from testing several step-count options.
FAQ
How do you get step height?
Total rise ÷ number of steps. A simple way to compare options before full stair geometry.
Is riser height enough to design stairs?
No. Tread depth, run, landings, and overall geometry still matter — this tool covers one key number.
What height usually feels comfortable?
Often around 15–20 cm — final rules depend on the project and local codes.
What if it’s too high?
Most often you add more steps, if the layout allows.
What if it’s very low?
You may have too many steps and an unnecessarily long run.
Why do a few centimetres matter so much?
You use stairs every day. A small change quickly messes with rhythm and comfort.
Can I use this for outdoor stairs?
Yes, as a quick aid. Outdoors you also worry about materials, freeze, and slip.
What else should I check nearby?
Proportion / slope / layout tools — e.g. the 3-4-5 ratio calculator.