GrowFAQ:

How do I convert watts to amps?

  Added by: Bongaloid    Viewed: 516 times  Rated by 4 users: 7.00/10
Watts divided by voltage equal amps.

A 400 watt ballast plugged into ordinary house current (120v) would draw 3.33 amps.

Using a little math we can see then:

Amps = Watts / Voltage
Watts = Voltage x Amps
Voltage = Watts / Amps
  Last modified: 14:43 - Feb 25, 2001 

faq:812 "How do I convert watts to amps?"