Best Refrigerator Temperature to Keep Food Fresh

When a new batch of refrigerators comes into our labs, we start by setting the ambient temperature in our climate-controlled chambers to 70° F to simulate conditions in a typical home kitchen.

Then we determine which thermostat setting on each refrigerator will get the internal temperature in the center of the unit to between 36° F and 38° F. We do the same thing in the freezer, experimenting until we get the freezer temperature to between -1° F and 1° F.

“Some refrigerators are spot-on, but others are wide off the mark,” says Breann Chai, CR’s test engineer for refrigerators. “We’ve seen a few refrigerators be off by as much as 5° F, which can be the difference between fresh food and spoiled food.”

It’s important to note that we don’t penalize refrigerators for inaccurate settings in our ratings. Most are capable of maintaining consistent temperatures once they reach the optimal level. The point is that you need to know how to get them to the 37° F and 0° F marks. And that’s why we include this information in the Features & Specs tab of our refrigerator ratings chart. You’ll find the ideal temperature setting for refrigerators with digital controls and the ideal numeric value for models with that type of thermostat.

What if your fridge isn’t one of our tested models? Your best bet is to buy a refrigerator thermometer, available online and at home centers for a few bucks, and conduct your own experiment. It won’t be as exact as the sensitive thermocouples we use in our lab, but it should get you within a degree or so of the perfect refrigerator temperature to keep your food fresh, tasty, and safe for as long as possible.