Electricity Cost Calculator
Calculate monthly and yearly electricity costs for all your appliances. Add as many devices as you like and see exactly what each one costs to run.
US average is ~$0.12–$0.16/kWh. Check your utility bill for your exact rate.
About the Electricity Cost Calculator
Understanding what your appliances cost to run is the first step to reducing your electricity bill. The formula is simple: monthly kWh = watts × hours/day × days/month ÷ 1000, then multiply by your rate. High-consumption appliances like air conditioners, electric heaters, and dryers typically dominate your bill. To right-size your air conditioner, use our BTU Calculator — an oversized unit costs more to run without improving comfort.
The US average residential rate is about $0.12–$0.16 per kWh, but rates vary significantly: Hawaii pays around $0.33/kWh while Louisiana averages about $0.09/kWh. Always check your utility bill for your exact rate. To understand the electrical requirements for your circuits, our Voltage Drop Calculator helps ensure your wiring is properly sized for the load.
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For a related calculation, use Ohm's Law Calculator to solve for voltage, current, resistance, or power (V, I, R, P) given any two known electrical values. Alternatively, use BTU Calculator to calculate BTU requirements for air conditioning or heating based on room size, insulation, and climate.