Wire Size Calculator

Find Recommended Wire Gauge

Current (Amps)

Wire Length (feet)One-way distance

System Voltage

Max Voltage Drop

Grounding Type(! Round trip = 2x wire resistance)

Current (Amps)

Wire Gauge (AWG)

System Voltage

Max Voltage Drop

Grounding Type(! Round trip = 2x wire resistance)

Tefzel Single Wall:Tefzel Single Wall (M22759/32). Lightweight aerospace grade (150°C).
Tefzel Dual Wall:Tefzel Dual Wall (M22759/16). Heavy duty aerospace grade (150°C).
TXL Wire:Thin wall cross-linked polyethylene (125°C). Automotive standard.

Standard (GPT):Standard automotive PVC wire (105°C).
Battery Cable (EPDM):Flexible EPDM insulation (105°C) for high-current battery/welding applications.
Grounding:Two-Wire (Round Trip): Electricity travels to device AND back through wire (2x resistance). Chassis Ground: Returns through vehicle body (1x resistance, single wire only).

* Calculations account for the selected grounding path. Always use the larger size if your calculation is between gauges.