The short answer
Multiply a fridge’s compatible annual kWh by your electricity price for annual cost. Divide that cost by 365 for a daily annual average or by 12 for a monthly average. These averages do not predict each day or month; a representative measured sample is a separate estimate with its own conditions.
Start with annual kWh and your electricity price
For a label-based estimate, multiply the fridge’s annual consumption by your entered price per kWh. The EU refrigeration label provides annual kWh; use the compatible annual figure from your own label or measurement.
There is no single household price that applies to every fridge. Consumption, the tariff and the source basis are separate inputs.
An illustrative daily and monthly calculation
Take an illustrative annual energy figure of 365 kWh and a tariff of £0.28 per kWh:
| Result | Calculation | Value |
|---|---|---|
| Annual electricity cost | 365 × £0.28 | £102.20 |
| Average monthly cost | £102.20 ÷ 12 | £8.52, rounded |
| Average daily cost | £102.20 ÷ 365 | £0.28 |
The result is convenient for budgeting. It does not claim that every actual month uses exactly one-twelfth of the electricity.
The daily figure uses 365 days by convention. A particular observation period or a leap year can use another divisor if you calculate it separately.
Avoid rounding before you multiply
Imagine annual cost of £63.00. Its daily average is about £0.1726, displayed as £0.17. Multiplying the rounded display by 365 gives £62.05, rather than £63.
Keep the annual calculation’s precision and round only the final displayed money. The site’s calculator does this internally. Use the annual result for annual comparisons rather than rebuilding it from a rounded daily value.
Why rated watts are not enough
A fridge can change its power draw as it operates. Treating a rating as continuous average draw for all 24 hours introduces an assumption that the rating alone does not establish.
A suitable accumulated-energy sample is different from a watt snapshot. Read the measurement guide if you want to understand an appliance already in your home.
Put a daily difference in perspective
Two illustrative alternatives consuming 200 and 250 kWh/year differ by 50 kWh. At £0.28, the difference is £14/year, or about four pence per averaged day. Compare that with the purchase-price difference and the storage you need.
Use the fridge calculator, read its label inputs, or compare keeping an old fridge.