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Toroidal winding calculations

Please note: IWM does not warrant or assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed below.

Toroidal Winding calculations
Setting up a new product to wind on a toroid machine, can involve a series time-consuming calculations.
The calculator shown below aims to be a guide in simplifying this process. Simply enter core dimensions and wiresize and the calculator will find wire length to load, and theoretical finished wound core dimensions. The resulting figures can also be used to decide the appropriate size of shuttle.
Input values
Output data
Core dimensions     Core dimensions    
Outer Diameter  "OD"
 mm
Theoretical Finished Outside Diameter  "OD"
 mm
Inner Diameter "ID"
 mm
Theoretical Finished Inner Diameter "ID"
 mm
Height "HT"
 mm
Theoretical Finished Height "HT"
 mm
Winding specification Winding specification    
Number of turns
 turns
Length per turn
 mm
Wire Size
 mm
Total length Millimetres
 mm
     
Total length Meters
 M
     
Total length Feet
 Ft
     
Turns per layer at wire pitch
 Turns
     
Number of layers 
 Layers
      Shuttle load turns    
     
 4" shuttle 
 Turns
     
 6" shuttle
 Turns
 
 8" shuttle
   Turns
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