Voltage Drop Calculator
Calculate Voltage Drop
Result
| Voltage Drop | — |
|---|---|
| Voltage Drop Percentage | — |
| Voltage at End | — |
About the Voltage Drop Calculator
This calculator determines the voltage drop across a wire based on its material, size, length, and the current flowing through it. It helps ensure your circuits are safely and efficiently designed according to standard electrical principles.
How it works
Voltage drop occurs because any wire, no matter how good a conductor it is, has some resistance. The longer the wire and the smaller its diameter, the higher the resistance. According to Ohm's Law (V = I × R), this resistance causes a drop in voltage along the circuit.
- DC / Single Phase AC: Calculates the drop considering the round-trip distance of the wire.
- 3-Phase AC: Uses a factor of the square root of 3 for the calculation.
- Copper vs. Aluminum: Copper is a better conductor than aluminum, resulting in less voltage drop for the same wire size.