Electricity Cost Calculator
Use this free calculator to estimate the cost of running an appliance. Enter the appliance’s power in watts, hours of use per day, days per month, and your electricity rate.
Calculator:
Electricity Cost Calculator
Estimate how much an appliance costs to run based on its power, daily usage, and your electricity rate.
Formula: watts ÷ 1,000 × hours × electricity rate.
This is an estimate. Actual costs can vary with appliance cycling, changing utility rates, and other charges on your bill.
How the calculation works
Watts are converted to kilowatts by dividing by 1,000. Kilowatts are then multiplied by the number of hours used and the electricity rate.
Daily cost = watts ÷ 1,000 × hours per day × electricity rate.
The monthly estimate multiplies the daily result by the number of days used, and the yearly estimate multiplies the monthly result by 12.
Why your real bill may differ
This calculator estimates the energy portion of an appliance’s cost. Your actual bill can include fixed charges, taxes, delivery charges, tiered rates, time-of-use rates, and other utility-specific items.