Electrical
Voltage Drop Calculator
Calculate the voltage drop across electrical conductors based on current, conductor length, cable size and material.
These calculators provide estimates and educational results. Always verify critical engineering calculations against applicable standards and qualified professional review.
Formula
Vd = 2 × I × L × R / 1000
Voltage drop is the decrease in electrical potential along a conductor carrying current.
Variables
| Symbol | Variable | Unit | Description |
|---|---|---|---|
| Vd | Voltage Drop | V | Voltage lost along the conductor |
| I | Current | A | Load current |
| L | Length | m | One-way cable length |
| R | Resistance | Ω/km | Conductor resistance per km |
Related Calculators