<P> The formula to calculate the circular mil for any given AWG (American Wire Gauge) size is as follows . A represents the circular mil area for the AWG size n . </P> <Dl> <Dd> A n = (5 × 92 36 − n 39) 2 (\ displaystyle A_ (n) = \ left (5 \ times 92 ^ (\ frac (36 - n) (39)) \ right) ^ (2)) </Dd> </Dl> <Dd> A n = (5 × 92 36 − n 39) 2 (\ displaystyle A_ (n) = \ left (5 \ times 92 ^ (\ frac (36 - n) (39)) \ right) ^ (2)) </Dd> <Ul> <Li> For example, a number 12 gauge wire would use n = 12; and the calculated result would be 6530 circular mils </Li> </Ul>

Circular mil area of 250 kcmil bare copper