# Voltage Drop Calculator

> Calculate voltage drop in a wire run (Single Phase).

Page: https://askcalculators.com/calculator/voltage-drop-calculator/
Definition: https://askcalculators.com/calculator/voltage-drop-calculator/definition.json
JSON Schema: https://askcalculators.com/calculator/voltage-drop-calculator/schema.json
Version: 7.0.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/calculator/voltage-drop-calculator/?voltage=120&current=10&distance=50&wireSize=14&material=copper

## Inputs
- voltage: Source Voltage (V); type=number; optional; default=120
- current: Load Current (Amps); type=number; optional; default=10
- distance: One-way Distance (Feet); type=number; optional; default=50
- wireSize: Wire Size; type=text; optional; default=14
- material: Material; type=text; optional; default=copper

## Outputs
- result: Result; format=text; primary

## Formula
Voltage drop = current × conductor resistance × circuit length factor; percentage drop = drop ÷ source voltage × 100.

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.