Ever wonder how much it costs to operate items in your home? Use this formula to calculate your cost per kWh. 

(Wattage x Hours Used)/1,000 x Electric Rate ($/kWh) = Total Cost

  • Example: Find out the cost of a 100 watt light bulb burning 10 hours a day with a rate of $.08/kWh. 
  • (100 watts x 10 hours)/1,000 = 1kWh or .$08 to operate

To calculate your $/kWh rate, use the formula below. 

Your Monthly Total Electric Bill Cost/Your Total kWh (consumption) for the Month = $/kWh Rate

  • Example: Find out the cost from a $55 electric bill with 650 kWh used during the billing period. 
  • $55/650 kWh = $0.846/kWh