AGM Batteries: Marine, RV, Aircraft & Solar

The best deep cycle marine batteries, AGM batteries, aircraft batteries, RV batteries, solar batteries and battery chargers available.

Advanced Power Products
955 Todd Avenue
Azusa, CA 91702
Tel. (626) 969-7227
Fax. (626) 969-8566

AC/DC Voltage Drop Over Copper & Aluminum Wire Calculator

The following calculator calculates the voltage drop, and voltage at the end of the wire for American Wire Gauge from 4/0 AWG to 30 AWG, aluminum or copper wire. (Note: System calculates ANY voltage drop, whether safe or not. CONSULT your local, city, state, and national electrical code or your electrician to decide what is legal before building!

Select Copper or Aluminum

Select American Wire Gauge (AWG) Size

Select Voltage

Enter 1-way circuit
length in feet

Enter Load
in amps

Voltage drop

Voltage at load end of circuit

Per Cent voltage drop

Wire cross section in circular mils

Cool Wire Tricks

The wire gauge is a logarithmic scale base on the cross sectional area of the wire. Each 3-gauge step in size corresponds to a doubling or halving of the cross sectional area. For example, going from 20 gauge to 17 gauge doubles the cross sectional area (which, by the way, halves the DC resistance).

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