Step-by-step instructions
- Enter or select Current (A).
- Enter or select Cable resistance (Ω/m).
- Enter or select Circuit length (m).
- Tap Calculate.
- Review the result shown directly below the calculator.
Cable Voltage Drop Calculator
Estimate DC voltage drop Vdrop = I × RperLength × length.
How to use the Cable Voltage Drop Calculator
Estimate DC voltage drop Vdrop = I × RperLength × length.
What the inputs mean
- Current (A)
- Enter the value requested by this field label.
- Cable resistance (Ω/m)
- Enter the value requested by this field label.
- Circuit length (m)
- Enter the measurement shown, using consistent units.
Formula or calculation method
The calculator applies the standard mathematical relationship for the labeled inputs and returns the computed result automatically.
Example
Try entering realistic values for Current (A) and Cable resistance (Ω/m), then tap Calculate to see how the result changes.
How to understand the result
Use the result as an estimate based on the values you entered. For planning decisions, double-check that the input units and assumptions match your real situation.
Tip: Keep all values in compatible units and use values from the same time period when the calculator compares two amounts.