How Long Do Eggs Last After the Date on the Carton?

You need two eggs for pancakes, the carton in the fridge says a date from last week, and the store is a twenty minute round trip. Throw them out, or crack them and hope? Most people guess, and most people guess wrong in the wasteful direction.

The short answer for refrigerated eggs bought in the United States: the date on the carton is usually not a safety cutoff, and eggs that have stayed cold are commonly fine for a few weeks past it. The longer answer depends on which date you are looking at, where you live, and how the eggs were stored. Here is how to work it out in about a minute.

What the date on the carton actually means

An egg carton can carry several different marks, and they do not mean the same thing.

• Sell by. A note for the store about how long to keep the eggs on the shelf. It is about stock rotation, not about when the eggs stop being safe to eat.
• Exp, use by or best by. The producer's estimate of when quality starts to fade. Whites get thinner and yolks flatten, but that is a quality change.
• A three-digit number. On cartons from USDA-graded plants this is often the pack date, written as the day of the year. 001 is January 1 and 365 is December 31. If you see 287, the eggs were packed around mid-October.

The pack date is the most useful number on the carton, and almost nobody reads it. Counting forward from it tells you how old the eggs really are, whatever the sell by date says.

Federal guidance from the USDA puts raw eggs in the shell at roughly three to five weeks in the refrigerator from the day you bring them home, provided the fridge stays at 40°F (4°C) or below. A sell by date can easily pass during that window.

Why the fridge matters more than the date

Here is the part that changes the answer. In the US, commercial eggs are washed before sale, which removes a natural coating on the shell called the cuticle. Without it, eggs need to stay cold, and an egg that has sat out at room temperature for more than about two hours should not go back into the fridge and be treated as fresh. Temperature swings let moisture form on the shell, which can help bacteria get through it.

In the UK and much of Europe, eggs are usually not washed, and many stores keep them on unrefrigerated shelves. The UK uses a best before date that is set no more than 28 days after laying. Even there, the Food Standards Agency advises keeping eggs in the fridge once they are home. So if you live outside the US, the logic is the same, just with a different label.

Where you keep them inside the fridge matters, too. The door is the warmest, most variable spot, because it swings open dozens of times a day. Keep eggs in their original carton on a middle shelf. The carton also stops them from absorbing smells from the cut onion next to them.

How long eggs keep, by form

These are commonly cited guidelines for refrigerated storage, mostly from USDA food safety advice. Treat them as sensible upper limits, not promises.

Frozen beaten eggs are a good rescue for a carton you will not get through. Whisk them, pour into a muffin tin or ice cube tray, freeze, then move the blocks into a labeled bag. Thaw overnight in the fridge and use them in baking or scrambled eggs.

The float test tells you age, not safety

You have probably seen the trick: lower an egg into a bowl of water. A fresh egg lies flat on the bottom. An older egg tilts or stands on its end. A very old egg floats.

It works because every egg has a small air pocket at the wide end, and the pocket grows as moisture slowly escapes through the shell. So the test is a decent way to judge age. What it cannot do is detect salmonella, the main food safety concern with eggs. A contaminated egg can sink like a fresh one, and an older egg that stands up can be perfectly fine to eat.

The float test answers "how old is this egg?" It does not answer "is this egg safe?"

The more useful check is your nose. Crack each egg into a small separate bowl before adding it to the batter. A spoiled egg smells unmistakable the moment the shell opens, and checking one at a time means a single bad egg does not ruin the other five.

Older eggs are not worse for everything. Eggs a week or two old peel much more easily after boiling, because the air pocket is larger and the membrane separates from the shell more readily. Many cooks save their oldest eggs for hard-boiling on purpose.

When to throw them out

Skip the guesswork and discard eggs if any of these is true:

• The shell is cracked, slimy or powdery.
• The egg smells sour or sulfurous when opened.
• The eggs sat out at room temperature for more than two hours, or about one hour on a hot day.
• You cannot remember how long they have been in the fridge and the pack date is more than five weeks back.

For people at higher risk from food poisoning, such as pregnant people, young children, older adults or anyone with a weakened immune system, the safer habit is to cook eggs until both white and yolk are firm, whatever their age. The same caution applies to other leftovers, as covered in how long cooked rice lasts in the fridge.

One thing to do this week

Open your fridge, find the egg carton, and look for the three-digit pack date. Write the date you bought them on the lid with a marker, move the carton off the door onto a middle shelf, and next time you hit the sell by date you will know exactly how much time you really have. If you tend to buy in bulk and lose track, the honest look at batch cooking in why freezer meal prep guides oversell the savings is worth a read, and the same date logic shows up again in how long protein powder lasts.