Voltage Drop Calculator

Calculate voltage drop for your landscape lighting installation. Ensure optimal performance by maintaining proper voltage at the end of your lighting runs.

Instructions for Use

  1. Run length and wattage need to be input from your site plan or design. Wattage should be the total wattage on the longest wire run.
  2. On-site adjustment: The easiest way to modify end of line voltage when on site is to use the variable voltage tap on the transformer.
  3. Wire gauge can be modified during the design process or on site. Increasing wire thickness (lower gauge number) will reduce total voltage drop.
  4. All wire needs to be direct burial copper landscape wire.
  5. Wire gauge and transformer tap voltage have dropdown menus; wattage and run length need to be entered directly.

Input Parameters

Note: End run voltage values shown in green indicate optimal performance. Values in orange or red indicate caution - performance issues such as lower output and/or flickering may occur.

Calculated Results

Voltage Drop
1.33 V
End Run Voltage
10.67 V
System performance is optimal.