Electricity Usage Calculator
Enter the appliance wattage, daily hours of use and your price per kWh to estimate what it costs you monthly and yearly.
Use the price per kWh shown on your own bill for a better estimate.
The starting value of $0.22 per kWh is only an editable starting point, not any utility's current rate. Your bill combines a base rate and adjustments that change over time: divide your bill total by the kWh consumed and use that number here.
Estimated monthly cost
$63.36
288 kWh · This appliance only; excludes fixed bill charges.
- Daily use
- 9.6 kWh
- Monthly use
- 288 kWh
- Yearly use
- 3,456 kWh
- Daily cost
- $2.11
- Yearly cost
- $760.32
Related tools
About this calculator
How it works
kWh per day = (watts ÷ 1,000) × hours used per day.
kWh per month = kWh per day × days used per month. Cost is those kWh multiplied by your price per kWh.
Use the price per kWh printed on your own bill for a better estimate. The calculator's starting value is only an editable starting point, not any utility's current rate: bills combine a base rate with adjustments that change over time.
Example
A 1,200-watt air conditioner running 8 hours a day, 30 days a month, at $0.22 per kWh: 9.6 kWh per day, 288 kWh per month and about $63.36 monthly.
Important limitations
- Presets are reference estimates, not your appliance's exact draw. Real wattage is on the product label.
- Compressor appliances such as refrigerators and inverter A/C units cycle on and off, so average consumption is usually lower than the nameplate maximum.
- Your bill includes fixed charges and adjustments this calculator does not estimate.
Learn more
Guides explaining the context behind this calculation.
Frequently asked questions
This calculation runs in your browser and is never sent to a server. Your last values may be saved on your device only, for convenience. Results are estimates and are not financial, tax, accounting or legal advice.