Appliance Electricity Cost & kWh Energy Calculator

Calculating appliance electricity costs requires converting wattage rating (W) into kilowatt-hours and multiplying by your local electric utility rate.

To use the Appliance Electricity Cost & kWh Energy Calculator, enter your Appliance Power Rating, Daily Operation Duration, Electricity Utility Rate and other values. The calculator instantly computes Total Energy Consumption, Total Electricity Cost and more. Results update in real time as you change any input — no submit button needed.

How to Use This Calculator

Enter your Appliance Power Rating (e.g. 1500 in Watts (W)), Daily Operation Duration (e.g. 4.0 in hours/day), Electricity Utility Rate (e.g. 0.16 in /kWh), and Evaluation Horizon — choose from Daily (1 Day), Monthly (30 Days), Annual (365 Days). Results update instantly as you type — adjust any value to compare scenarios.

The Formula

Daily kWh = (Appliance Watts × Daily Hours) ÷ 1,000

Total kWh = Daily kWh × Days

Electricity Cost () = Total kWh × Utility Rate (/kWh)

Worked Example

1,500 Watt space heater running 4 hours per day at 0.16/kWh utility rate:

Daily Consumption = / 1,000 = 6.00 kWh/day.

Monthly Cost = 180.0 kWh × 0.16 = 28.80/month.

Understanding Your Result

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