Voltage Drop Calculator

Calculate the voltage drop in an electrical circuit over a specific distance and resistance.

Voltage Drop (V)7.56 V
Percentage Drop6.3%

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What is Voltage Drop?

As electrical current travels through a wire, the natural resistance of the metal causes some energy to be lost as heat. This loss of electrical pressure is called voltage drop.

Why it Matters

The National Electrical Code (NEC) recommends a maximum voltage drop of 3% for branch circuits and 5% overall to ensure equipment runs efficiently and safely without overheating.