Convert the metric wire diameter into millimeters. For example, if the wire diameter is given as 0.005827 meters, multiple by a factor of 1,000 to obtain 5.827 millimeters.
Input the wire diameter (in millimeters) into the equation AWG = (-ln(d)+2.1104)/(0.11594), where d is the wire diameter in millimeters and AWG is the American wire gauge number. A wire diameter of 6.544 millimeters equates to a No. 2 AWG wire.
Reconvert wire given in AWG to a metric wire size using the equation d = exp^(2.1104-0.11594*AWG). Using this equation, a No. 1 AWG wire has a diameter of 6.544 millimeters.
- An increasing wire diameter decreases the AWG number. Doubling the wire diameter decreases the AWG by 6 units.