

Use this do-it-yourself Home Energy Audit to find ways to save. Check each area of your home to make sure you're using energy efficiently. Every nook and cranny holds potential inefficiencies, so it pays to be thorough!
By understanding your energy usage, you can take charge of your electric bill. Use these formulas to help calculate your energy usage and projected costs.
A watt (W) is a measurement of power. Most appliances and light bulbs are labeled with the wattages they use.
A kilowatt (kW) is equivalent to 1000 watts.
A kilowatt-hour (kWh) is a measurement of energy consumption. It is the amount of power used over time, and the basis for how electric bills are calculated.
Calculate Energy Consumption: Power × Time = Energy. For example, using a 100-watt bulb for 10 hours equals 1 kWh. (100 watts × 10 hours = 1000 watt-hours or one kilowatt-hour.)
Calculate Energy Costs: Power (kW) × Time (hours of operation) × Price ($/kWh) = Cost of Operation
To find out how much it may cost to run a specific appliance, follow these 5 easy steps. Keep in mind that you are billed per kilowatt-hour (kWh), or for how much electricity you use in one hour. Examples are based on an average cost of $0.144 per kWh.
Remember: Calculate and Conserve! For the example used, you might want to conserve energy by putting the heater on a thermostat or timer to decrease the time it is used.