how to calculate kwh
Kilowatt-hour
The kilowatt-hour (symbolized kW⋅h) is a unit of energy equivalent to one kilowatt (1 kW) of power sustained for one hour. One watt is equal to 1 J/s.
Formula
KWH = watts (P) * time(T)
1000
KWH = P * T
1000
KWH = 1kw * 1 hr
Example :
a large ran motor rated at 4400 watts and you use it 5 hrs. a day to find consumed kwh /month.
Formula :
1000
Wattage = 4400
Usage per day = 5 hrs
= P * T
1000
= 4400* 5
1000
= 22000
1000
= 22 kw per day
Monthly
= 22kwh * 30 days
= 660 units per month
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