Part of the topic: 🏠 Home, energy & car
Electricity cost calculator for devices
Find out what your TV, PC, heater or fridge really costs. Enter the power in watts, how long it runs and your electricity price.
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🔒 Runs entirely in your browser – nothing you enter is uploaded or stored.
How to use it
- Read the wattage from the device label or a plug-in energy meter.
- Enter how many hours per day and days per week it runs, plus standby power.
- Use the price per kWh from your electricity bill.
Last checked: October 2026 · Based on: Power × hours × price per kWh. Found a mistake? Use the form below – we fix confirmed errors and update the date.
Frequently asked questions
How is the cost calculated?
kWh = watts × hours ÷ 1,000. Cost = kWh × price per kWh. Standby counts for the remaining hours.
Why is my real consumption different?
Many devices don't draw their maximum (label) power all the time – a fridge cycles on and off, a PC varies with load. A plug-in energy meter gives the most accurate figure.
Where do I find my price per kWh?
On your electricity bill or contract, as the “working price” (Arbeitspreis) in cents per kWh.