First, you need to convert the number of watts into kW. To do that, you divide the number of watts by 1,000. So 100 W is 0.1 kW, 60 W is 0.06 kW, and 1500 W is 1.5 kW. To get the number of kWh, you just multiply the number of kW by the number of hours the appliance is used. For example, a device rated at 1,500 W that’s on for 2.5 hours:
If we run a 1,000W electric appliance for 1 hour, we spend 1 kWh of electricity. 1 kWh of electricity costs anywhere from 0.10€ (Bulgaria) to 0.30€ (Germany). To generate 1 kWh of electricity, we have to combust 0.0947 m3 or 94.7 liters of natural gas (100% efficient combustion).Monthly electric bills are a product of how much electricity you use per month and your electric rate. In Suffolk County, NY, the average monthly electric bill for residential customers is $235/month, which is calculated by multiplying the average monthly consumption by the average electric rate: 961 kWh * 24 ¢/kWh.