Calculator
Your files never leave your device
Check your Network tab and see
Work starts the moment you drop a file
No daily limit, no sign-up, no watermark
From an appliance's wattage and hours of use, the tool gives the energy in kWh and, with your tariff, the running cost. It is the quick way to see what a heavy device actually costs over a day or month.
Motors, ACs, and fridges cycle on and off and rarely pull their rated wattage continuously, so treat the result as an upper estimate. Use average running hours, not the time the appliance is merely switched on.
That is the promise behind every tool here. Files are read in your browser tab, processed there, and discarded when you close it — never uploaded to our servers.
