COOLING
Air conditioner running cost
Compare window, portable, and central AC power use with daily cooling hours.
Calculate AC costAPPLIANCE COST GUIDES
Start with the loads that move your electric bill.
Each guide combines an editable calculator, current EIA state residential rates, realistic wattage ranges, and limitations that affect real-world use.
HEATING
Space heater running cost
See why a 1,500-watt heater can add up quickly during long cold-weather use.
Calculate heater costKITCHEN
Refrigerator running cost
Translate compressor wattage and estimated duty cycle into a monthly cost.
Calculate refrigerator costLAUNDRY
Clothes dryer running cost
Estimate a drying cycle and compare electric heat with shorter drying times.
Calculate dryer costELECTRIC VEHICLES
Home EV charging cost
Estimate Level 1 or Level 2 charging from power, charging time, and local rate.
Calculate EV chargingONE FORMULA
Transparent inputs on every page.
Every guide uses the same core calculation: watts ÷ 1,000 × hours used × price per kWh. The result is an energy-cost estimate, not a prediction of the entire utility bill.
For the best result, replace typical values with the appliance nameplate wattage and the energy rate from your bill.
Review our methodology →