text: help with equation: 1000 watts = 1 kilowatt. appliance runs on 210 volts and needs 40 amps.? how do you equate to kilowatts? volts x amps = watts and 1000 watts = 1 kilowatt  210 volts x 40 amps = 8,400watts or 8.4 kilowatts since 8,400/1,000 = 8.4