L-Shaped Staircase with Winders Calculator

Display
DU
CL
Staircase Type
LF
RG
Connection type Winder Steps to Newel Post
LOC
INT
Stairs Dimensions, Stairwell
Y
X
Z
Calculate Total Run Along
FTP
FBT
Steps
QB
1
QT
13
SW
SF
SO
SP
Risers
H
HT
AS
Stringers
T
WI
Winder Stringers
IT
IW
Support Joists
JT
JW
Support Posts
SB
Upper Floor Slab
SX
WX
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 (Slope/Pitch): 31.61 °
  • Comfortable Staircase Formula (R + G): 43.74 cm
  • Blondel's Formula (2R + G): 60.41 cm
  • Rise (Step Height): 16.67 cm
  • Tread Depth (Step Width): 31.88 cm
  • Going: 27.08 cm
  • Number of Steps: 17 pcs.
  • Stairway Width: 100 cm
  • Minimum Throat Depth: 15.81 cm
Winder Stringer №1
  • Minimum Throat Depth: 29.33 cm
Winder Stringer №2
  • Minimum Throat Depth: 22.1 cm
Materials for construction
Lower Stringers
  • Width: 12.67 cm
  • Length: 27.08 cm
  • Thickness: 4 cm
  • Quantity: 2 pcs.
  • Volume: 0.003 m3
Winder Stringer №1
  • Width: 38.87 cm
  • Length: 102.19 cm
  • Thickness: 4 cm
  • Quantity: 1 pcs.
  • Volume: 0.016 m3
Winder Stringer №2
  • Width: 38.09 cm
  • Length: 108.15 cm
  • Thickness: 4 cm
  • Quantity: 1 pcs.
  • Volume: 0.016 m3
Upper Stringers
  • Width: 30 cm
  • Length: 423.07 cm
  • Thickness: 4 cm
  • Quantity: 2 pcs.
  • Volume: 0.102 m3
Winder Step №1
  • Tread Depth: 63.32 cm
  • Length: 100 cm
  • Thickness: 4 cm
  • Quantity: 1 pcs.
  • Volume: 0.025 m3
Winder Step №2
  • Tread Depth: 65.98 cm
  • Length: 137.82 cm
  • Thickness: 4 cm
  • Quantity: 1 pcs.
  • Volume: 0.036 m3
Winder Step №3
  • Tread Depth: 53.57 cm
  • Length: 117.1 cm
  • Thickness: 4 cm
  • Quantity: 1 pcs.
  • Volume: 0.025 m3
Straight Steps
  • Tread Depth: 31.88 cm
  • Length: 100 cm
  • Thickness: 4 cm
  • Quantity: 14 pcs.
  • Volume: 0.179 m3
Risers (Straight Steps)
  • Width: 12.67 cm
  • Length: 100 cm
  • Thickness: 1.8 cm
  • Quantity: 14 pcs.
  • Volume: 0.032 m3
Riser (Winder Step №1)
  • Width: 12.67 cm
  • Length: 100 cm
  • Thickness: 1.8 cm
  • Quantity: 1 pcs.
  • Volume: 0.002 m3
Riser (Winder Step №2)
  • Width: 12.67 cm
  • Length: 108.01 cm
  • Thickness: 1.8 cm
  • Quantity: 1 pcs.
  • Volume: 0.002 m3
Riser (Winder Step №3)
  • Width: 12.67 cm
  • Length: 107.13 cm
  • Thickness: 1.83 cm
  • Quantity: 1 pcs.
  • Volume: 0.002 m3
Balustrade
  • Handrail Width: 8 cm
  • Handrail Thickness: 4 cm
  • Balustrade Length: 469.96 cm
  • Volume: 0.015 m3
Balusters
  • Width: 5 cm
  • Length: 86.84 cm
  • Quantity: 15 pcs.
  • Volume: 0.033 m3
Newel Post
  • Width: 8 cm
  • Length: 106.67 cm
  • Quantity: 1 pcs.
  • Volume: 0.007 m3
Support Posts
  • Width: 8 cm
  • Length: 200.67 cm
  • Volume: 0.013 m3
Support Joists
  • Width: 15 cm
  • Length: 93 cm
  • Thickness: 5 cm
  • Quantity: 2 pcs.
  • Volume: 0.014 m3
  • Joist Width №1: 15 cm
  • Joist Width №2: 15 cm
Initial parameters
Display
  • Units: cm
  • Drawing Color: color
Staircase Type
  • Left Turn:  selected
Connection type Winder Steps to Newel Post
  • Tongue and Groove Joint:  selected
Stairs Dimensions, Stairwell
  • Total Rise: 300 cm
  • Total Run: 452 cm
  • Stairway Width: 100 cm
Calculate Total Run Along
  • Upper Stairway:  selected
Steps
  • Quantity (Lower Stairway): 1 pcs.
  • Quantity (Winders): 3 pcs.
  • Quantity (Upper Stairway): 13 pcs.
  • Total Quantity: 17 pcs.
Risers
  • Thickness: 1.8 cm
Stringers
  • Thickness: 4 cm
  • Width: 30 cm
Winder Stringers
  • Thickness: 4 cm
  • Width: 40 cm
Support Joists
  • Thickness: 5 cm
  • Width: 15 cm
Support Posts
  • Width: 8 cm
Upper Floor Slab
  • Slab Overhang: 200 cm
  • Distance from Wall: 140 cm
  • Thickness: 20 cm
Balustrade
  • Balustrade Height: 90 cm
  • Baluster Width: 5 cm
  • Handrail Thickness: 4 cm
  • Handrail Width: 8 cm
Wall
  • Thickness: 20 cm
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How to calculate L-Shaped Stair with Winders?

  • Step 1. Choose the measurement units, DU — mm, cm, m, inches, feet.
  • Step 2. Choose the drawing color, CL — monochrome, color.
  • Step 3. Choose the staircase type — left turn, LF, right turn, RG.
  • Step 4. Choose how to calculate total run — along upper stairway, FTP, along lower stairway, FBT.
  • Step 5. Input the stair, stairwell dimensions — total rise, Y*, total run, X, stairway width, Z.
    * from the 1nd floor level to the 2nd floor level
    * total rise = stairwell height (if top step is on the 2nd floor level)
  • Step 6. Choose type of winder steps connection to newel post — tongue and groove joint, LOC, mounting inside the newel post, INT.
  • Step 7. Input the steps parameters — number of steps on upper stairway, QT, number of steps on lower stairway, QB, thickness, SW, nosing, SF*.
    * nosing = tread overlap
  • Step 7.1. Select to install the top step below 2nd floor level or keep it at the 2nd floor level, SP.
  • Step 8. Select to install risers or not, H.
  • Step 8.1. Input the risers parameter — thickness, HT.
  • Step 9. Input the stringers parameters — thickness, T, width, WI.
  • Step 10. Input the stringers with winders parameters — thickness, IT, width, IW.
  • Step 11. Input the support joists parameters — thickness, JT, width, JW.
  • Step 12. Input the support posts parameter — width, SB.
  • Step 13. Input the balustrade parameters — baluster width, BA, baluster height, RH, handrail thickness, RT, handrail width, RW.
  • Step 14. Input the upper floor slab parameters* — thickness, ST, overlap, SX, distance from wall, WX.
    * required for visualization only
  • Step 15. Input the wall parameter* — thickness, WT.
    * required for visualization only
  • Step 16. Please check all entered values, click the «Calculate» button and get a L-Shaped Staircase with Three Winders design.

 

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Drawing L-shaped Staircase with Three Winders
Drawing L-shaped Staircase with 3 Winders
Optimal Step Size
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