Light More, Pay Less — find the correct wire size (AWG) for your Low Voltage landscape lighting. Enter watts and distance to calculate voltage drop and recommended cable.
Calculator
Low Voltage Wire Size & Voltage Drop
Choose 15% for practical installs, or 10% for premium brightness.
Gauge (AWG)
Resistance (Ω/1000 ft, Cu)
Voltage Drop (V)
Drop (%)
Status
Method: VD = 2 × length(ft) × amps × (Ω/ft). Amps = watts ÷ voltage. We recommend the thinnest (highest AWG number) that stays under your selected drop limit.
Best Practices for Choosing Landscape Lighting Cable
Use the next thicker wire if your run is close to the voltage drop limit.
Split loads across multiple runs to reduce drop.
Use direct-burial copper cable for underground installs.
Consider multi-tap transformers (13–15V) to offset drop on long runs.