U-Shaped Staircase Calculator (180 degree turn, Half turn)

Advanced and user-friendly U-shaped staircase dimensions calculator — Get all sizes stairs, parts drawings, 3D-project and the amount of materials for FREE.

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Display
DU
CL
Staircase Type
LF
RG
Stairs Dimensions, Stairwell
Y
X
Z
LDW
MDS
Calculate Total Run Along
FTP
FBT
Steps
QT
11
QB
9
SW
SF
SP
Stringers
T
WI
Support Joists
JT
JW
Risers
H
HT
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 (Slope/Pitch): 30.32 °
  • Comfortable Staircase Formula (R + G): 42.79 cm
  • Blondel's Formula (2R + G): 58.58 cm
  • Rise (Step Height): 15.79 cm
  • Tread Depth (Step Width): 32.5 cm
  • Going: 27 cm
  • Number of Steps: 17 pcs.
  • Stairway Width: 100 cm
  • Minimum Throat Depth: 16.37 cm
Materials for construction
Lower Stringers
  • Width: 30 cm
  • Length: 216.93 cm
  • Thickness: 4 cm
  • Quantity: 2 pcs.
  • Volume: 0.052 m3
Upper Stringers
  • Width: 30 cm
  • Length: 322.35 cm
  • Thickness: 4 cm
  • Quantity: 2 pcs.
  • Volume: 0.077 m3
Straight Steps
  • Tread Depth: 32.5 cm
  • Length: 100 cm
  • Thickness: 4 cm
  • Quantity: 17 pcs.
  • Volume: 0.221 m3
Risers
  • Width: 11.79 cm
  • Length: 100 cm
  • Thickness: 2.5 cm
  • Quantity: 18 pcs.
  • Volume: 0.053 m3
Landing
  • Width: 105.5 cm
  • Length: 200 cm
  • Thickness: 4 cm
  • Quantity: 1 pcs.
  • Volume: 0.084 m3
Balustrade
  • Handrail Width: 8 cm
  • Handrail Thickness: 4 cm
  • Balustrade Length: 555.76 cm
  • Volume: 0.018 m3
Balusters
  • Width: 5 cm
  • Length: 86.83 cm
  • Quantity: 18 pcs.
  • Volume: 0.039 m3
Newel Posts
  • Width: 8 cm
  • Length: 105.79 cm
  • Quantity: 2 pcs.
  • Volume: 0.014 m3
Support Posts
  • Width: 8 cm
  • Length: 122.32 cm
  • Quantity: 8 pcs.
  • Volume: 0.063 m3
Landing Support Joists
  • Width: 15 cm
  • Total Length: 1000 cm
  • Thickness: 5 cm
  • Quantity: 7 pcs.
  • Volume: 0.075 m3
Initial parameters
Display
  • Units: cm
  • Drawing Color: color
Stairs Dimensions, Stairwell
  • Total Rise: 300 cm
  • Total Run: 370 cm
  • Stairway Width: 100 cm
  • Stair Landing Depth: 100 cm
  • Opening between Stairways: 0 cm
Calculate Total Run Along
  • Upper Stairway:  selected
Steps
  • Quantity (Upper Stairway): 10 pcs.
  • Quantity (Lower Stairway): 8 pcs.
  • Thickness: 4 cm
  • Nosing (Tread Overlap): 3 cm
Stringers
  • Thickness: 4 cm
  • Width: 30 cm
Support Joists
  • Thickness: 5 cm
  • Width: 15 cm
Risers
  • Thickness: 2.5 cm
Support Posts
  • Width: 8 cm
Upper Floor Slab
  • 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 U-Shaped Stair?

  • 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, opening between stairways, MDS.
    * 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. Input the landing parameter — depth, LB*.
    * landing depth = distance from upper stairway bottom step to wall
  • Step 7. Input the landing support joists parameters — thickness, JT, width, JW.
  • Step 8. Input the support posts parameter — width, SB.
  • Step 9. 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 9.1. Select to install the top step below 2nd floor level or keep it at the 2nd floor level, SP.
  • Step 10. Select to install risers or not, H.
  • Step 10.1. Input the risers parameter — thickness, HT.
  • Step 11. Input the stringers parameters — thickness, T, width, WI.
  • Step 12. Input the balustrade parameters — baluster width, BA, baluster height, RH, handrail thickness, RT, handrail width, RW.
  • Step 13. Input the upper floor slab parameter* — thickness, WT.
    * required for visualization only
  • Step 14. Input the wall parameter* — thickness, WT.
    * required for visualization only
  • Step 15. Please check all entered values, click the «Calculate» button and get a U-Shaped Staircase with Landing design.

 

Plans of Staircase 180° Turn — Layout Notations 

Drawing U-shaped Staircase with Landing
Drawing Half Turn Staircase with Landing
Optimal Step Size
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