Cold appliances
Fridge Freezer Running Cost Calculator UK
Fridge freezers cycle on and off. Use average wattage or divide annual kWh by 365 for a better estimate.
Estimated running cost
- Per hour
- 0.99p
- Per day
- 23.68p
- Per week
- £1.66
- Per month
- £7.11
- Per year
- £86.44
Formula: average wattage ÷ 1,000 × 24 hours × electricity price.
Cost table
| Scenario | Power | Use time | Cost at 24.67p/kWh |
|---|---|---|---|
| Efficient model, 25W average | 25W | 24 hours | 14.80p |
| Typical model, 40W average | 40W | 24 hours | 23.68p |
| Older model, 70W average | 70W | 24 hours | 41.45p |
Formula
average wattage ÷ 1,000 × 24 hours × electricity price = running cost
For example, a 40W fridge freezer used for 24 hours at 24.67p/kWh costs 0.04 x 24 x 24.67p = 23.68p.
Ways to reduce the cost
- Keep seals clean and replace damaged door gaskets.
- Set sensible temperatures: about 3-5C fridge and -18C freezer.
- Leave ventilation space behind the appliance.
- Defrost manual freezers before ice builds up.
FAQs
Why is the wattage low?
The average over 24 hours is much lower than the compressor's peak draw.
How do I use the energy label?
Use the annual kWh figure and multiply it by your pence-per-kWh rate.
Does an old fridge freezer cost more?
Often yes, especially if seals, thermostat or insulation have degraded.
Should I switch it off overnight?
No. Food safety and refreezing risk usually make this unsuitable.
Last reviewed 3 May 2026. Source: Ofgem energy price cap. Figures are estimates. Actual prices vary by region, supplier, tariff, payment method and meter type.