Electricity Cost Calculator
Estimate your power bill by appliance. Calculate kWh usage and see daily, monthly, and yearly electricity costs.
Calculate Appliance Electricity Cost
Household Electricity Estimate
Energy-Saving Tips
Switch to LED Bulbs
LED bulbs use up to 75% less energy than incandescent bulbs and last 25 times longer. Replace your 5 most-used fixtures first.
Use Smart Power Strips
Phantom loads from electronics on standby can add 5-10% to your bill. Smart strips cut power to devices when they're not in use.
Optimize Thermostat
Set to 68F in winter and 78F in summer. Each degree adjustment can save 3% on heating/cooling costs.
Run Full Loads
Only run your dishwasher and washing machine with full loads. This can save 50+ loads per year, reducing water and energy costs.
How Electricity Costs Are Calculated
Electricity cost is based on three factors: the wattage of your appliance, how many hours you use it per day, and your electricity rate (measured in dollars per kilowatt-hour, or $/kWh).
The formula is: Cost = (Watts x Hours / 1,000) x Rate. For example, a 1,500W space heater running 8 hours a day at $0.16/kWh costs (1,500 x 8 / 1,000) x $0.16 = $1.92 per day.
Understanding Your Electricity Rate
Your electricity rate appears on your utility bill, usually listed as a cost per kWh. The US national average is approximately $0.16/kWh, but rates vary significantly by state and provider. Check your most recent bill for your exact rate.
Average US Household Electricity Usage
- Average monthly usage: ~900 kWh
- Average monthly cost: ~$137
- Top consumers: HVAC (heating/cooling), water heating, and large appliances
- Biggest savings opportunities: Thermostat management, LED lighting, and Energy Star appliances
Tips for Reading Your Power Bill
Look for your total kWh consumed and the rate per kWh. Many utilities have tiered pricing where your rate increases as you use more electricity. Some offer time-of-use rates where electricity is cheaper during off-peak hours (typically nights and weekends).