Calculate dimensions, step riser, and rotation for a spiral staircase.
Staircase Dimensions
Staircase Specs
Design your staircase
Enter total height and diameter to see step specifications.
About this calculator
Overview
Designing a spiral staircase requires balancing vertical rise with comfortable rotation. This calculator helps determine the number of steps and the rise per step based on standard comfort rules.
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Pro Tips
Ensure you have enough headroom (typically 2 meters) at the point where the user passes under the floor above.
A standard rotation per step is often around 30 degrees.
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Fun Facts
"An ideal step rise is typically between 17cm and 20cm (approx 7-8 inches)."
"Spiral staircases save significant floor space compared to straight runs."
"Most spiral stairs rotate 360 degrees or close to it, depending on the entry and exit points."
Formula: Steps = Total Height / Ideal Rise
Rise = Total Height / Steps
