Voltage Drop Calculator
Calculate voltage drop with Calculator 360 using the available inputs.
Try an example
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How to use this calculator
Estimate voltage drop for an entered one-way conductor run. Select AWG or mm² as an input to the same calculation. This page does not choose a wire size or certify electrical-code compliance.
Enter your own values and units, then check the assumptions shown with the result.
AWG nominal solid-round-wire area is used solely as a calculation input. Actual conductor construction and applicable electrical requirements must be checked for a real project. References: NIST Copper Wire Tables (American Wire Gage) ·
Frequently asked questions
What does this calculator estimate?
Estimate voltage drop for an entered one-way conductor run. Select AWG or mm² as an input to the same calculation. This page does not choose a wire size or certify electrical-code compliance.
Which values does it use?
It uses the values entered in the form. No live rate, price, tax, or code requirement is retrieved.