Calculate voltage drop in an electrical wire — enter wire length, current, conductor material and wire gauge (AWG) to ensure safe installation.
Enter your figures and click Calculate to see your results.
Enter the system voltage, current load, one-way wire length, conductor material and wire gauge.
Press the Calculate button. All results appear instantly — no page reload needed.
Results appear with all key values labelled. Use Copy to grab the result or Download to save a text report.
Yes — completely free with no sign-up required. All calculations run instantly in your browser.
Results use standard scientific and engineering formulas and are accurate to the precision shown.
Yes — fully responsive and works on all devices.
No — all calculations happen locally in your browser. Nothing is uploaded or stored.
Yes — use the Download button after calculating to save a text summary of your results.
