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Spiral Staircase Calculator

Staircase height mm

Rotation angle °

Staircase diameter mm

Number of steps mm

Name	Value	Units of Measurement	Note
Staircase height, H	{{H}}	mm	{{info1}}
Rotation angle, a	{{angle}}	°	{{info2}}
Staircase diameter, D	{{diameter}}	mm	{{info3}}
Number of steps, n	{{count_step}}	pcs.	{{info4}}
Step height, h	{{height_step}}	mm	{{info5}}
Step width along the movement line, w1	{{width_step_run}}	mm	{{info6}}
Step width at a distance of 150 mm, w2	{{width_step_150}}	mm	{{info7}}

Welcome to the Spiral Staircase Calculator – your essential tool for precise step and dimension calculation. Use this calculator to determine the optimal parameters for your spiral staircase design, including the step count, rise (vertical distance between floors), diameter, and rotation angle.

Key Features of the Spiral Staircase Calculator:

Enter the staircase height (the vertical distance from one floor to the next).
Select the staircase rotation angle.
Specify the staircase diameter for accurate step size determination.
Set an approximate number of steps for balanced design.
Receive a detailed drawing of each step after a successful calculation.

Once you input the data and press the "Calculate" button, a table with the primary parameters – including individual step dimensions – will be generated. For a more detailed analysis, hover over the images to view the exact measurements of each staircase component.

Tips for Using the Calculator:

If increasing the number of steps results in smaller dimensions, consider adjusting the rotation angle when modifying the diameter or height is not an option.
The tread width along the walking line (w1) is measured along the arc of the step at 2/3 of the distance from the center, which provides the optimal walking zone.
The measurement for w2 is taken 100 mm from the center to account for the support pole diameter, typically resulting in w2 being 150 mm from the center.

By using the Spiral Staircase Calculator, you can design a safe, comfortable, and stylish staircase that meets your individual requirements. Feel free to share this tool with colleagues and explore our other helpful construction calculators on our website.