Electrical usage is measured in watts (W).
- A 1000 watt is 1 kilowatt [1000W = 1 KW].
- Consumption of an appliance are converted to a one hour (h) period, known as kilowatt / 1 hour = kWh.
- Units of electricity we purchase are equal to the kilowatts of electricity consumed per hour. One unit of the electricity that we purchase is equal to 1000 watt-hours (Wh) or one kilowatt-hour (kWh).
Let us look at the numbers – Home Appliances:
The higher the wattage rating, the more electricity is required to operate per hour.
An appliance will use the wattage (W) rating of electricity in an hour if left on, uninterrupted. For example, a 60 watt light bulb will use 60 watt-hours of electricity in one hour and 120-watt hours of electricity in 2 hours if used continuously. Remember 1000 watt = 1 kWh = 1 electrical unit bought,
- 1 unit of electricity bought = 1 kilowatt-hour = 1000 watt-hours.
- The wattage tells you how much electricity an item consumes.
- The higher the wattage of an item or appliance, the more electricity it uses in a standard period of time.