How Your Electricity Bill Is Calculated
Your bill = total kilowatt-hours (kWh) used × your local rate. One kWh is 1,000 watts running for one hour. A 100-watt bulb on for 10 hours uses 1 kWh. US rates average 12–14 cents per kWh nationally, but range from 9 cents (Louisiana) to 30+ cents (Hawaii and California).
The Biggest Electricity Users at Home
HVAC accounts for 40–50% of a typical home's electricity use, followed by water heating (12%), lighting (10%), and refrigerators (8%). An electric dryer running one cycle daily adds about 40–50 kWh per month. Standby power from electronics in sleep mode (“vampire loads”) can add 5–10% to your bill even when devices are not actively in use.
Practical Ways to Cut Your Bill
Switching to LED lighting reduces lighting energy by 75%. Setting the thermostat 7–10°F lower while sleeping or away can save up to 10% on HVAC annually. Running dishwashers and washing machines on full loads during off-peak hours (typically nights and weekends) reduces costs further if your utility offers time-of-use pricing.
Frequently Asked Questions
How much electricity does a typical home use?
The average US household uses about 900 kWh per month, costing roughly $140–$150 at national average rates.
What uses the most electricity?
Heating and cooling (HVAC) accounts for 40–50% of most home electricity bills, followed by water heating and major appliances like dryers and refrigerators.
How do I reduce my electricity bill quickly?
Replace incandescent bulbs with LEDs, lower the thermostat 2–3°F, unplug devices you rarely use, and run appliances during off-peak hours if your utility plan allows it.