What is the best temperature for a freezer?

Luuk10 NOVEMBER 2025

Content

What if the freezer temperature is too low?
What if the freezer temperature is too high?
How can you save energy costs with your freezer?

A white freezer compartment with ice build-up along the top edge. Vertical slots line the back.

The ideal temperature for a freezer is -18 degrees Celsius. This keeps your products fresher for longer without using excessive energy. Below you’ll find answers to some frequently asked questions about freezer temperature.

What if the freezer temperature is too low?

Open white freezer with clear drawers. Bottom drawer contains frozen food covered in frost.

If the freezer temperature is too low, the appliance uses much more energy than necessary. Products stay fresh just as long at -18 degrees as they do at -30 degrees. That’s why it’s a waste to set your freezer too cold and why -18 degrees Celsius is considered the best temperature. At this temperature, products freeze quickly without unnecessary energy consumption. This applies to all freezers, from mini freezers to under-counter models, and from upright freezers to built-in freezers.

Read all about fridge-freezers

What if the freezer temperature is too high?

A freezer with colorful containers of frozen vegetables and fruit, and hands holding a container with corn.

If the freezer temperature is too high, it can lead to food spoilage. In the worst case you may get food poisoning or other health issues if you eat products that have not been properly frozen. This especially occurs with freestanding freezers, as they are connected to a wall socket and have to work hard to reach the optimal temperature. If your freezer is in a very cold room, it can also become disrupted and warm up. Therefore, do not place freezers in, for example, an unheated shed or garage.

How to choose a freestanding freezer

How can you save energy costs with your freezer?

There are several ways to save energy costs with your freezer. Firstly, it’s important to set and maintain the freezer at the correct temperature, ideally -18 degrees Celsius. Secondly, it’s wise to defrost the freezer regularly. A layer of ice makes the freezer work harder to maintain the right temperature. Thirdly, place the freezer in a cool spot and ensure there is sufficient ventilation space behind it. This helps dissipate heat more effectively, so the freezer doesn’t have to work as hard.