Compare multiple appliances
Energy in kWh = watts / 1000 × daily hours × days × quantity × duty cycle. Cost is energy times your entered tariff. No online tariff or tier data is requested.
Example and limitations
A 100 W lamp used 5 hours daily for 30 days consumes 15 kWh at 100% duty cycle. Refrigerators and air conditioners cycle; adjust duty cycle or use measured consumption. This is not a complete utility bill.