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Energy Cost Calculator

How much does it cost to operate an electrical device in your home? It might be more than you think!
Enter Your Data
Cost of Electricity at Your Highest Rate Tier (Cents per kWh)
Power Consumed by Device (W)
Average Usage per Day
Average Usage of Days per Month
Calculated Results
Energy Used per Month (kWh)
Cost per Week ($)
Cost per Month ($)
Cost per Year ($)
  1. Enter the cost you pay for electricity at your highest rate tier.
  2. Enter the power (watts) consumed by the device. If the amperage (amps) is known, multiply the amps times the voltage: Watts = Amps × Volts.
      Example: 5 Amps × 120 Volts = 600 Watts.
  3. Select the average number of hours the device is in use each day.
  4. Select the average number of days the device is in use each month.
  5. Click the 'Calculate' button to see your results.
For detailed instructions, see application note 4448, "Calculating Energy Usage: How Costs Drive Conservation."