This transformer wire length calculator estimates the total wire in a winding from the number of turns and the mean length of one turn. Enter both values above.
Formula
Wire length = Turns × Mean turn length
The mean turn length is the average perimeter around the core former for the winding.
Example
540 turns with a mean turn length of 0.25 m: length = 540 × 0.25 = 135 m.
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Frequently Asked Questions
How do I find transformer winding length?
Multiply the number of turns by the mean length of one turn around the core.
What is mean turn length?
It is the average perimeter of a single turn around the former, midway between the inner and outer layers.
Why estimate wire length?
It sets the copper cost, winding resistance, and weight of the coil.