How it is calculated
With the label: annual cost = kWh/year × price per kWh.
With wattage: kWh/year = W × 24 h × 365 days × share of time the compressor runs ÷ 1,000. Payback for a new model = new model price ÷ annual saving.
Worked example
Using the calculator’s example values:
- What do you know?: Annual consumption from the label (kWh/year)
- Annual consumption: 250 kWh/year
- Compressor running time: 35%
- Electricity price: $0.15/kWh
- Consumption of a new model (optional): 150 kWh/year
- Price of the new model (optional): $0.00
Result: Annual cost — $37.50 (monthly cost: $3.13; daily cost: $0.10; annual consumption: 250 kWh).
Money-saving tips
- Leave space behind it so the condenser can breathe.
- Don’t put hot food inside and keep door openings short.
- Check the seals: if a sheet of paper slides out with the door closed, it is leaking cold air.
Frequently asked questions
Is the label consumption realistic?
It is measured under standardised lab conditions. At home it varies with kitchen temperature, how often the door is opened and the thermostat setting.
Is it worth replacing a fridge that still works?
Only if the annual saving pays for the purchase within a period that makes sense to you. The calculator gives you that number of years; weigh it against expected lifespan.
Where can I find the compressor wattage?
On the rating plate (usually inside on a side wall or at the back). Remember the compressor does not run continuously.
How we calculate and the limits of the results: Methodology.