Device electricity cost calculators
Browse electricity cost calculators by appliance. In the US version you can keep the latest saved EIA average or switch to a state-level price from the selector.
Featured calculators
Portable Air Conditioner
Estimate portable air conditioner electricity use and running cost. Adjust watts, runtime or cycles, and price per kWh to compare daily, monthly, and yearly cost.
12000 BTU Split Air Conditioner
Estimate 12000 btu split air conditioner electricity use and running cost. Adjust watts, runtime or cycles, and price per kWh to compare daily, monthly, and yearly cost.
Space Heater
Estimate space heater electricity use and running cost. Adjust watts, runtime or cycles, and price per kWh to compare daily, monthly, and yearly cost.
EV Charging (2300 W plug)
Estimate ev charging (2300 w plug) electricity use and running cost. Adjust watts, runtime or cycles, and price per kWh to compare daily, monthly, and yearly cost.
Dehumidifier
Estimate dehumidifier electricity use and running cost. Adjust watts, runtime or cycles, and price per kWh to compare daily, monthly, and yearly cost.
Refrigerator Freezer
Estimate refrigerator freezer electricity use and running cost. Adjust watts, runtime or cycles, and price per kWh to compare daily, monthly, and yearly cost.
Electric Oven
Estimate electric oven electricity use and running cost. Adjust watts, runtime or cycles, and price per kWh to compare daily, monthly, and yearly cost.
Dishwasher
Estimate dishwasher electricity use and running cost. Adjust watts, runtime or cycles, and price per kWh to compare daily, monthly, and yearly cost.
Popular comparisons
Use these side-by-side pages when you are already choosing between two appliances or device sizes.
Portable air conditioner vs tower fan electricity cost
Compare portable AC and tower fan running cost with the same electricity price and time period. This page helps you see how much comfort costs when you choose active cooling over low-power airflow.
Space heater vs mini split electricity cost
Compare a resistive space heater against a mini split style heat pump setup using the same price per kWh. This is the fastest way to see how expensive direct electric heating can become compared with a higher-efficiency option.
Gaming PC vs laptop electricity cost
Compare the electricity cost of a gaming desktop against a laptop with the same tariff and time horizon. This helps when you want to estimate whether a portable setup materially lowers your energy bill.
Oven vs air fryer electricity cost
Compare oven and air fryer running cost with matched electricity pricing and period settings. This is useful when you want to know whether smaller electric cooking loads justify changing appliances for everyday meals.
EV plug vs wallbox electricity cost
Compare EV charging through a standard plug and a 7 kW wallbox with the same electricity price. This page focuses on bill impact and charging speed assumptions, not on installation cost or total project payback.
Portable air conditioner vs mini split electricity cost
Compare portable AC and mini split running cost with the same electricity price and time horizon. This is useful when you want to know whether lower-efficiency room cooling is costing more than a fixed high-efficiency setup.
Full device catalog
Open any calculator, then adjust wattage, runtime or cycles, and price per kWh.