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Voltage Drop Calculator — result sheet
Calculate two-conductor voltage drop from current, one-way length, resistance, and source voltage.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Loop resistance = resistance per 1,000 x 2 x length/1,000; voltage drop = current x loop resistance.
The resistance is an explicit input, so the result does not silently choose an AWG, material, temperature, phase, or code table.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Load current — A; minimum 0; maximum 100000
- One-way conductor length — minimum 0; maximum 1000000
- Resistance per 1,000 length units — ohm; minimum 0; maximum 1000000
- Source voltage — V; minimum 0.001; maximum 1000000
Worked example
| Input | Value |
|---|---|
| Load current | 10 |
| One-way conductor length | 100 |
| Resistance per 1,000 length units | 1.2 |
| Source voltage | 120 |
Loop resistance is 0.24 ohm and voltage drop is 2.4 V.
Assumptions and limits
- DC or single-phase two-conductor resistive path.
- This does not determine ampacity or replace electrical-code design.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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