Kilowatts to kilowatt-hour calculation formula The energy E in kilowatt-hour kWh is equal to the power P in kilowatts kW times the time period t in hours hr. The kilowatt formula is 1 kw 1000 watts. EkWh PW thr 1000.
The formula to convert from watts to kilowatts is.
Formula of converting watts to Kilowatt hours E kWh P W x t hr 1000 which means that the energy in Kilowatt hour is computed by multiplying the power in watts by the time in seconds then the result is multiplied by 1000. PW 1000 PkW. 1250 watt hours day 1000 watts 1 kilowatt 125 kilowatt hours per day. For example lets convert 5 kWh at 120 V to Ah.