Winder Staircase Calculator
Use this free tool to calculate and create detailed drawings of the staircase with winders — Get full set plans in different views, dimensions, 3D model.
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Choose Drawing:
- Staircase Drawing (Side View)
- Staircase Drawing (Front View)
- Staircase Drawing (Top View)
- Support Posts
- Lower Stringer
- Lower Stringer with Winders №1
- Lower Stringer with Winders №1 (Pattern)
- Intermediate Stringer with Winders
- Intermediate Stringer with Winders (Pattern)
- Upper Stringer with Winders №2
- Upper Stringer with Winders №2 (Pattern)
- Upper Stringer
- Straight Step
- Lower Winder Step
- Intermediate Winder Step (Linear)
- Intermediate Winder Step (Side)
- Upper Winder Step
- Risers of the Straight Steps
- Risers of the Lower Winder Steps
- Risers of the Intermediate Winder Steps
- Risers of the Upper Winder Steps
Calculation results
Staircase Dimensions
- Angle: 32.01 °
- Comfortable Staircase Formula (R + G): 43.33 cm
- Blondel's Formula (2R + G): 60 cm
- Rise: 16.67 cm
- Tread Depth: 34.17 cm
- Going: 26.67 cm
- Number of Steps: 17 pcs.
- Stair Width: 100 cm
- Minimum Throat Depth: 15.87 cm
Lower Stringer with Winders
- Minimum Throat Depth: 23.97 cm
Upper Stringer with Winders
- Minimum Throat Depth: 21.49 cm
Intermediate Stringer
- Minimum Throat Depth: 21.49 cm
Materials for construction
Lower Stringers
- Width: 30 cm
- Length: 155.11 cm
- Thickness: 6 cm
- Quantity: 2 pcs.
- Wood Volume: 0.056 m3
Lower Stringer with Winders №1
- Width: 40 cm
- Length: 112.11 cm
- Thickness: 6 cm
- Quantity: 1 pcs.
- Wood Volume: 0.027 m3
Intermediate Stringer
- Width: 40 cm
- Length: 216.06 cm
- Thickness: 6 cm
- Quantity: 1 pcs.
- Wood Volume: 0.052 m3
Upper Stringer with Winders №2
- Width: 37.52 cm
- Length: 110.76 cm
- Thickness: 6 cm
- Quantity: 1 pcs.
- Wood Volume: 0.025 m3
Upper Stringers
- Width: 30 cm
- Length: 198.6 cm
- Thickness: 6 cm
- Quantity: 2 pcs.
- Wood Volume: 0.071 m3
Lower Winder Steps
- Tread Depth: 66.2 cm
- Length: 100 cm
- Thickness: 4 cm
- Quantity: 2 pcs.
- Wood Volume: 0.053 m3
Intermediate Winder Steps
- Tread Depth: 68.78 cm
- Length: 139.03 cm
- Thickness: 4 cm
- Quantity: 2 pcs.
- Wood Volume: 0.076 m3
Upper Winder Steps
- Tread Depth: 56.68 cm
- Length: 119.73 cm
- Thickness: 4 cm
- Quantity: 2 pcs.
- Wood Volume: 0.054 m3
Straight Steps
- Tread Depth: 34.17 cm
- Length: 100 cm
- Thickness: 4 cm
- Quantity: 11 pcs.
- Wood Volume: 0.15 m3
Risers of the Straight Steps
- Width: 12.67 cm
- Length: 100 cm
- Thickness: 2.5 cm
- Quantity: 11 pcs.
- Wood Volume: 0.035 m3
Risers of the Lower Winder Steps
- Width: 12.67 cm
- Length: 100 cm
- Thickness: 2.5 cm
- Quantity: 2 pcs.
- Wood Volume: 0.006 m3
Risers of the Intermediate Winder Steps
- Width: 12.67 cm
- Length: 106.3 cm
- Thickness: 2.5 cm
- Quantity: 2 pcs.
- Wood Volume: 0.007 m3
Risers of the Upper Winder Steps
- Width: 12.67 cm
- Length: 105.99 cm
- Thickness: 2.5 cm
- Quantity: 2 pcs.
- Wood Volume: 0.007 m3
Balustrade
- Handrail Width: 8 cm
- Handrail Thickness: 4 cm
- Handrail Length: 369.01 cm
- Wood Volume: 0.012 m3
Balusters
- Width: 5 cm
- Length: 86.85 cm
- Quantity: 12 pcs.
- Wood Volume: 0.026 m3
Lower Newel Post
- Width: 8 cm
- Length: 156.67 cm
- Quantity: 1 pcs.
- Wood Volume: 0.01 m3
Upper Newel Post
- Width: 8 cm
- Length: 106.67 cm
- Quantity: 1 pcs.
- Wood Volume: 0.007 m3
Support Posts
- Width: 10 cm
- Length: 859.33 cm
- Wood Volume: 0.086 m3
Support Joist
- Width: 15 cm
- Length: 80 cm
- Thickness: 5 cm
- Quantity: 2 pcs.
- Wood Volume: 0.012 m3
- Joist Width №1: 15 cm
- Joist Width №4: 15 cm
Initial parameters
Display
- Units: cm
- Drawing Color: color
Staircase Type
- Left Turn: selected
Type of Winder Steps Connection to Newel Post
- Tongue and Groove Joint: selected
Stairs Dimensions, Stairwell
- Total Rise: 300 cm
- Total Run: 260 cm
- Stair Width: 100 cm
Calculate Total Run Along:
- Upper Stairway: selected
Steps
- Quantity (Lower Stairway): 5 pcs.
- Quantity (Winders): 6 pcs.
- Quantity (Intermediate Stairway): 0 pcs.
- Quantity (Upper Stairway): 6 pcs.
- Total Quantity: 17 pcs.
Risers
- Thickness: 2.5 cm
Stringers
- Thickness: 6 cm
- Width: 30 cm
Stringers with Winders
- Thickness: 6 cm
- Width: 40 cm
Support Joist
- Thickness: 5 cm
- Width: 15 cm
Support Posts
- Width: 10 cm
Upper Floor Slab
- Thickness: 20 cm
Balustrade
- Handrail Height: 90 cm
- Baluster Width: 5 cm
- Handrail Thickness: 4 cm
- Handrail Width: 8 cm
Wall
- Thickness: 20 cm
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