Instant calculator
Voltage Drop Calculator
Use the voltage drop calculator to estimate line losses on a simple two-conductor run.
How to use
Quick steps
- Enter system voltage, current, one-way length, wire resistance.
- Review the instant answer block and supporting calculations.
- Compare the result with related tools in the same category before making a decision.
Formula
How this calculator works
Voltage drop = current x circuit length x resistance per 1000 ft x 2 / 1000
This is a simplified estimate and does not replace electrical code review or conductor sizing guidance.
FAQ
Common questions
How does the voltage drop calculator work?
It uses Voltage drop = current x circuit length x resistance per 1000 ft x 2 / 1000. Enter system voltage, current, one-way length, and wire resistance to generate an instant estimate.
When should I use this voltage drop calculator?
Estimate circuit voltage drop from length, current, and wire resistance.
What should I keep in mind?
This is a simplified estimate and does not replace electrical code review or conductor sizing guidance.