The physics
Every appliance's cost is just power (kilowatts) × time (hours) × price (per kWh).
Yearly cost of a 100 W TV, 4 h a day at €0.25/kWh
Answer: cost per year = 36.53 € (cost per day 0.1 €, cost per month 3.04 €, energy per year 146.1 kWh).
What we know
- Appliance power: 100 W
- Usage per day: 4 hours
- Electricity price: 0.25 €/kWh
Step by step
- Given
- Appliance power = 100 W, Usage per day = 4 hours, Electricity price = 0.25 €/kWh
- Formula
- Cost = (W / 1000) × hours × price per kWh
- Result
- Cost per year = 36.53 €
All results
| Cost per day | 0.1 € |
|---|---|
| Cost per month | 3.04 € |
| Cost per year | 36.53 € |
| Energy per year | 146.1 kWh |
Open the electricity cost calculator with these numbers → and change any of them.