Free car audio & PA calculators

Quick calculators for car audio installs and PA systems. They run in your browser, need no sign-up and do not store anything you type.

• Speaker impedance calculator
  Total ohms for speakers or DVC subwoofer coils in series, parallel or series-parallel, with an amplifier load check.
• Amp wattage & SPL calculator
  How many watts you need for a target dB level at a distance, or how loud a given amplifier will be.
• Speaker wire gauge calculator
  Wire resistance, power loss and the recommended AWG for your run length and speaker load.

More help: our car & pro audio guides.

More free audio tools: Speaker impedance calculator · Amp wattage & SPL calculator · Speaker wire gauge calculator

Home · Audio tools · Guides · About · FAQ & Contact

These calculators run entirely in your browser; nothing you type is sent or stored. Results are estimates based on standard formulas; always check your amplifier and speaker manuals.