Turns per Inch

This calculator computes turns per inch for standard AWG wires. This model is also part of the air core coil design.

For turn spacing (Turns per Inch) choose one of the following:

• Bare Wire - Enter the guage, then double the diameter. During assembly, use a length of the same size wire as a spacer between turns.
• Enamelled Wire - Manually add 0.005" to the diameter.
• Insulated Wire - Either measure the OD including insulation and use this, or wrap several turns around a ruler and measure the turns per inch.