Watt and Ampere Calculator
LED Lighting Tool

LED Watts to Amps Calculator

Find the current draw for LED lights and strips. LEDs are efficient but add up quickly in large installations. Calculate total amps to size drivers, choose the correct wire gauge, and prevent tripped breakers.

Conversion direction
Electrical system
Quick voltage presets
Calculated result1000 W · 120 V · DC
8.333 A
Formula usedI = P / V

Custom voltage is always supported.

Formulas Used

DCI = P / V

No power factor needed for DC circuits.

AC 1φI = P / (V × PF)

Single-phase AC — multiply voltage by power factor.

AC 3φI = P / (√3 × V × PF)

Three-phase AC — divide by √3 ≈ 1.732.

Frequently Asked Questions

How many amps does a 12V LED strip use at 60W?

60W / 12V = 5A. A standard 5A LED controller is exactly sufficient; use a 6A or 8A controller for headroom and longevity.

How many LED downlights on a 20A circuit at 120V?

A 10W LED at 120V draws about 0.084A. A 20A circuit (80% rule = 16A max continuous) can handle 16 / 0.084 = 190 fixtures. In practice, NEC requires derated loading, so check your local code.