DC Voltage Drop Calculator

Calculate voltage drop in DC circuits based on wire size, current, and distance.

A
m
V
Voltage Drop Visualization

Voltage Drop Guidelines

Maximum Recommended Voltage Drop
Application Max Drop
Power Circuits 3%
Lighting Circuits 5%
Control Circuits 10%
Wire Selection Tips
  • Consider temperature derating
  • Account for future expansion
  • Check voltage drop at startup
  • Consider bundling effects
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