VoltageDropCalculator.net is a free, browser-based voltage drop calculator for electricians, engineers and students. Enter load (amps, watts or HP), voltage (12V DC to 480V 3-phase), copper or aluminum, conduit type and one-way length to see the voltage drop, end voltage and a wire size checked against 3%/5% limits.
Key features
- Voltage drop for AC and DC circuits, single or three phase
- Suggested conductor size checked against NEC 3%/5% limits
- Also conduit fill, ampacity derating and Ohm's law calculators
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