Appliance monthly cost
Pick the appliance (or enter its power), the daily hours of use and your kWh price.
Calculation methodology
C_mes = (P/1000) × h × d × Pr
P power (W), h hours/day, d days/month, Pr kWh price.
Worked example
A 1500 W air conditioner, 3 h/day for 30 days at €0.15/kWh: €20.25/month.
Frequently asked questions
What average power for a fridge?
A modern A++ fridge averages about 100-150 W while running 24 h/day.
What about an air conditioner?
A 12,000 BTU/h split uses between 800 and 1500 W when the compressor runs.
And an electric oven?
Usually 2000 to 2500 W, although it's not always running at full power.
How do I reduce monthly cost?
Use appliances during off-peak hours (if you have time-of-use), turn off standby, and check energy efficiency.