Winder Staircase Calculator

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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Also see
Display
DU
CL
Staircase Type
LF
RG
Type of Winder Steps Connection to Newel Post
LOC
INT
Stairs Dimensions, Stairwell
Y
X
Z
Calculate Total Run Along:
FTP
FMD
FBT
Steps
QB
5
QM
0
QT
6
SW
SF
SP
Risers
H
HT
Stringers
T
WI
Stringers with Winders
IT
IW
Support Joist
JT
JW
Support Posts
SB
Upper Floor Slab
ST
Balustrade
RH
BA
RT
RW
Wall
WT
Error calculationPlease check your input
the Calculator will be available after changes in the relevant parameters.
Click "Calculate" to open the options window.
Choose Drawing:
Distance: 0
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 (Run): 26.67 cm
  • Number of Steps: 17 pcs.
  • Staircase 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: 0.013 m3
Intermediate Winder Steps
  • Tread Depth: 68.78 cm
  • Length: 139.03 cm
  • Thickness: 4 cm
  • Quantity: 2 pcs.
  • Wood Volume: 0.019 m3
Upper Winder Steps
  • Tread Depth: 56.68 cm
  • Length: 119.73 cm
  • Thickness: 4 cm
  • Quantity: 2 pcs.
  • Wood Volume: 0.014 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
  • Staircase Width: 100 cm
Calculate Total Run Along:
  • Upper Stair Flight:  selected
Steps
  • Quantity (Lower Flight): 5 pcs.
  • Quantity (Winders): 6 pcs.
  • Quantity (Intermediate Flight): 0 pcs.
  • Quantity (Upper Flight): 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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