Voltage Drop Calculator

A voltage drop calculator estimates the voltage drop of an electrical current based on the wire, size, distance, and anticipated load current.

Follow the steps below to use the voltage drop calculator tool:

1: Enter the initial voltage.
2: Choose if your system operates on 12 V or 24 V
3: Select AC or DC. Choose which voltage type your system operates. Typically the overall selections will be 12 Vdc and 24 Vac.
4: Enter the current of your camera in amps. Note: 1 amp = 1000 mA. Thus, if your camera draws 300 mA, enter 0.3 into this field
5: Enter the distance of your cable in feet
6: Enter the size of your cable. CCTV standard is 18 awg
7: Click ‘Calculate.’ Click ‘Cancel’ to clear the results and start again.


Cable Length

Cable Guage

Initial Voltage