How it is calculated
Annual kWh for each appliance = W × hours per day × days per week × 52 ÷ 1,000.
Cost = kWh × price. The percentage shows its share of the total for the appliances entered.
Worked example
Using the calculator’s example values:
- Electricity price: $0.15/kWh
- Appliances: 5 example rows
Result: Annual cost of all appliances — $109.79 (monthly cost: $9.15; annual consumption: 731.9 kWh; highest cost: computer: $35.10).
Money-saving tips
- Appliances that heat (oven, iron, water heater) usually have the highest wattage.
- For appliances with a thermostat or compressor, rated power overestimates use: use a plug-in meter.
- Start saving with the one at the top of the list.
Frequently asked questions
Where do I find an appliance’s wattage?
On the rating plate or in the manual, in W or kW. A plug-in meter shows real consumption.
Can I include the fridge?
Better use the fridge calculator with the label’s annual consumption, as its compressor does not run continuously.
Is my list saved?
Your data is kept in the page address: use “Share” to save the link or send it.
How we calculate and the limits of the results: Methodology.