Use this workshop calculation to turn measured dimensions and the selected construction convention into a cut, spacing, fit, or material-planning value.

Floor height (cm)

Total floor-to-floor height in centimeters.

Target rise (cm)

Target riser height in centimeters between 10 and 25.

Divide a floor height by a target riser height to get the rounded-up step count and the resulting actual riser height. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Step count

Number of steps, the floor height divided by the target rise and rounded up.

Actual rise (cm)

Actual riser height in centimeters, the floor height divided by the step count.

• Nominal dimensions, kerf, moisture movement, hardware clearances, wall squareness, and manufacturer instructions can change the required shop dimension. Measure the actual assembly and test critical joints on scrap before cutting finished material.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Complement the calculated dimension with a physical story stick, dry fit, or full-size layout. Follow the hardware, coating, adhesive, or machine manufacturer's limits where they differ from a rule of thumb.

• Clamp Count

  Round up clamp count from total target clamping force and the usable force rating per clamp at the actual setup.

• Riser Height Check

  Check whether a stair riser height falls in the ideal 17 to 18 cm range and report its deviation in centimeters.

• Treppen Bequemlichkeitsregel

  Compute the German stair comfort-rule dimension as tread going minus riser height; interpret it as a planning metric, not proof of code compliance.