Wire/Cable Voltage Drop Calculator Wire/Cable Voltage Drop Calculator Wire/Cable Voltage Drop Calculator Wire Length (m) Current (A) Resistance (Ω/km) Calculate Understanding Voltage Drop Voltage drop occurs when the voltage at the end of a cable is lower than at the beginning due to resistance in the wire. The voltage drop can be calculated using the formula: \[ V_{drop} = 2 \times I \times R \times L \] Where: \(V_{drop}\) is the voltage drop (V) \(I\) is the current (A) \(R\) is the resistance of the wire (Ω/km) \(L\) is the one-way length of the wire (km) Example Calculation For a wire with a length of 100 meters (0.1 km), carrying a current of 15 amperes, and with a resistance of 0.0175 Ω/km, the voltage drop is: \[ V_{drop} = 2 \times 15 \, \text{A} \times 0.0175 \, \Omega/\text{km} \times 0.1 \, \text{km} = 0.0525 \, \text{V} \] Use the calculator above to experiment with different wire lengths, currents, and resistances to see how they affect the voltage drop! Subscribe to Updates Get the latest creative news from SmartMag about art & design.