Cable Resistance & Voltage Drop Calculator
by Amit Shinde
what is Cable Resistance & Voltage Drop Calculator
A professional engineering tool to calculate the electrical resistance of a two-wire cable loop and the resulting voltage drop, based on the formula R = (2 * l * ρ) / A.
How to use Cable Resistance & Voltage Drop Calculator?
Step 1: Enter Cable Length
Input the total one-way length of your cable run in meters (m) or feet (ft). This is the distance from the power source to the load.
Step 2: Specify Conductor Material & Size
Select the conductor material (e.g., Copper or Aluminum) to use its specific resistivity (ρ). Then, enter the conductor's cross-sectional area in square millimeters (mm²) or American Wire Gauge (AWG).
Step 3: Input Load Current
Enter the current in amperes (A) that the electrical load is expected to draw. This is the current flowing through the cable.
Step 4: Calculate & View Results
Click the 'Calculate' button. The tool will instantly compute and display the total loop resistance (R) using the formula R = (2 * l * ρ) / A, and the resulting voltage drop for the given current.