The physics
Every appliance's cost is just power (kilowatts) × time (hours) × price (per kWh).
Yearly cost of a fridge averaging 150 W, 24 h a day at €0.30/kWh
Answer: cost per year = 394.47 € (cost per day 1.08 €, cost per month 32.88 €, energy per year 1,314.9 kWh).
What we know
- Appliance power: 150 W
- Usage per day: 24 hours
- Electricity price: 0.3 €/kWh
A fridge cycles on and off; 150 W is the assumed AVERAGE draw, not its rating.
Step by step
- Given
- Appliance power = 150 W, Usage per day = 24 hours, Electricity price = 0.3 €/kWh
- Formula
- Cost = (W / 1000) × hours × price per kWh
- Result
- Cost per year = 394.47 €
All results
| Cost per day | 1.08 € |
|---|---|
| Cost per month | 32.88 € |
| Cost per year | 394.47 € |
| Energy per year | 1,314.9 kWh |
Open the electricity cost calculator with these numbers → and change any of them.