U-Shaped Staircase with Winders Calculator

U-Shaped Staircase with Winders Calculator

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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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KALK.PRO offers you free U-shaped stairs calculator. This type of staircase is also called half turn stairs or switchback stairs. From the top view the U shaped stairs resembles the letter “U”, it's name comes from the shape. Two parallel straight flights of the switchback stairs are separated by the winder steps block, turned by 180 degrees.

 The half-turn staircase has a lot of advantages, that determine its popularity in civil engineering. U-stairs are easy to fit small-space home's architectural plans, have an aesthetic appearance, not so difficult to build, comfortable and safe. 

Our U-shaped stairs calculator will help you to determine all significant dimensions for building a staircase online. It's also easy to use KALK.PRO switchback stairs calculator for stair layout and 3D visualisation.

Use our online tool to see your stairs plans in 2D from side to top. We also offer you an interactive 3D architectural visualization of your future staircase.

Please make sure your stair design complies with all local building codes and regulations requirements! It is very crucial step.

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