Winding wire diameter
The program allows the calculation of the minimum diameter of the winding wire at the required current flowing through it.
Current density [A/mm2]
Current in conductor [A]


  1. Specify the value of current density and current in the wire and press [Calculate]. Winding wire diameter (in millimeters to two decimal places) will be shown in the figure on the left.
  2. Results of calculations can be used to determine the diameter of the wires used in mains/power and output transformers.
  3. It is important to provide the correct value of current density. The default value is 2.5 [A/mm2] and for the copper wire can be successfully used in most practical applications.
© TRIODA Grzegorz Makarewicz