Wire Gauge Calculator

Type in the power output of the amp, the impedance of the cabinet or speaker, and the length of the speaker cable you want to run. The answer will be the gauge of the stranded wire you should use for the speaker cable. This calculator is limited to 500 watts, greater than 2 ohms, and cable lengths not to exceed 20 feet.

Power Applied

Amp Power Output

Load Impedance

Ohms of the cabinet
or speaker

Length of Cable in Feet

The distance between
the amp chassis and
the cabinet or speaker

Wire Gauge

Size of the stranded wire
you should use