Estimate Appliance Electricity Costs
An electricity estimate starts with the appliance’s power in watts, the number of hours it runs, and the electricity price per kilowatt-hour. Convert watts to kilowatts by dividing by 1,000, then multiply by hours of use to estimate kilowatt-hours. Multiply that energy figure by the rate to estimate the running cost.
Worked example
A 1,500-watt heater used for 2 hours consumes about 3 kWh (1.5 kW × 2 hours). At a rate of 60 per kWh, the estimated energy cost is 180. If the appliance cycles on and off or changes power level, actual use may be lower than the simple full-power estimate.
Use a realistic schedule and rate
Estimate typical daily use, then multiply by the number of days in the billing period for a rough monthly figure. Electricity bills can include taxes, fixed charges, tiered rates, fuel adjustments, and time-of-use pricing. Enter the rate that best represents the relevant consumption tier and treat the result as an energy-only estimate unless other charges are added separately.
Limitations
The calculator runs locally and does not read a meter or retrieve your utility’s live tariff. Check the appliance label and your latest bill for the correct inputs. For high-load equipment or unusual wiring, consult a qualified electrician rather than using a cost estimate as an electrical safety assessment.