LED Power Supply Calculator

For LED light manufacturers, installers & wholesalers — total wattage, load current, required supply capacity and recommended margin.

Load
Supply
Total load
– W
Load current
– A
Min supply rating
– W
Recommended supply
– W
Next standard size
– W
Ptotal = n × Peach · I = P / V (DC) or P / (V × PF) (AC) · Psupply = Ptotal × (1 + margin/100) — the 20% margin keeps the driver at ≤ 80% load for cooler, longer life.