Use our free 12 Volt Wire Size Calculator to accurately determine the correct wire gauge for your DC applications. Avoid voltage drop and ensure efficient power delivery for automotive, RV, solar, and marine setups. Input your amperage, one-way distance, and acceptable voltage drop percentage for precise results. Find the right AWG wire size today!
Formula:
= rac{2 \cdot I \cdot L \cdot K}{V \cdot (\%VD/100)}$
Where:
$ = Required Circular Mils (unit of wire cross-sectional area)
$ = Current in Amps
$ = One-way wire length in feet
$ = Resistivity of copper (10.4 CM-Ohms/foot at 20°C)
$ = Source Voltage (12 Volts)
$\%VD$ = Acceptable Voltage Drop Percentage