How Long Eggs Stay Fresh in Your Refrigerator

Eggs last three to five weeks in the refrigerator, measured from the packing date on the carton

The packing date — a number from 1 to 365 representing the day of the year the eggs were packed — is your real expiration marker. A carton packed on day 100 of the year will stay safe to eat until around day 145 to 165, depending on your refrigerator temperature and how often you open the door. This is not the same as a "sell by" or "use by" date; those dates are guidelines for stores, not hard stops for your kitchen.

Eggs are remarkably durable because the shell is a barrier against bacteria, and the refrigerator slows the natural aging process inside. A raw egg stored at 40°F (the standard refrigerator temperature) degrades much more slowly than one left on the counter. The yolk and white gradually lose moisture and the yolk may flatten slightly, but the egg remains safe to cook and eat well past the point where it would spoil at room temperature.

The exact window depends on three things: the packing date, your refrigerator temperature, and storage position. Eggs stored in the main compartment at a steady 40°F last longer than eggs stored in a warmer spot like the door. Keeping them in their original carton — rather than in a loose egg holder — protects them from absorbing odors and shields them from temperature swings every time you open the refrigerator.

Key Takeaways

• Check the packing date on the carton, not a "sell by" date, to know when eggs will start to decline.
• Eggs stored at 40°F in the main compartment of your refrigerator stay fresh for three to five weeks from the packing date.
• Keep eggs in their original carton to protect them from odors and temperature fluctuations caused by opening the door.
• A floating egg in water or a runny white when cracked means the egg is old but not necessarily unsafe; cook it thoroughly if you use it.
• Refrigerator temperature matters more than anything else — a unit that drifts above 40°F shortens the safe window significantly.

Why the packing date matters more than printed expiration dates

The packing date is printed as a three-digit number (called the Julian date) on the side or end of the carton. It tells you exactly when the eggs were washed, graded, and packed into the carton at the facility. From that point, the clock starts. A carton with packing date 045 was packed on the 45th day of the year — mid-February in a non-leap year.

A "sell by" date printed on the same carton is typically 30 days after packing. Stores use this to rotate stock and remove old inventory from shelves. But that date is not a safety cliff. Eggs can remain safe to eat for one to three weeks after the "sell by" date passes, as long as they were stored cold the whole time and the shell is not cracked or visibly dirty.

The U.S. Department of Agriculture (USDA) does not require an expiration date on eggs at all — only the packing date. Some producers add a "best by" date as a courtesy, but it is not a legal requirement and it is often more conservative than necessary. If you see only a packing date and no other marking, that is normal and sufficient.

How to store eggs so they last the full window

Store eggs in the main body of the refrigerator, not in the door. The door is the warmest part of a refrigerator because it is opened and closed constantly, letting warm air in. Eggs are sensitive to temperature swings. Keeping them in the coldest, most stable zone — usually the middle or lower shelf — extends their life by a week or more compared to door storage.

Leave eggs in their original carton. The carton insulates them, keeps them from rolling and cracking, and prevents them from absorbing strong odors from other foods (eggs are porous). A loose egg in a plastic holder or sitting directly on a shelf loses moisture faster and picks up flavors from nearby items like onions or fish.

Make sure your refrigerator is holding 40°F or below. Use a simple refrigerator thermometer (available at any grocery store for a few dollars) to check. If your unit is running warmer than 40°F, eggs will age faster and the safe window shrinks. A refrigerator drifting to 45°F cuts the storage life roughly in half. If you notice your refrigerator is too warm, adjust the dial or thermostat and give it 24 hours to stabilize before checking again.

Signs an egg is aging and when to throw it out

An old egg floats in water. Fresh eggs sink and lie flat on the bottom of a bowl. As an egg ages, the air cell inside grows larger and the egg becomes more buoyant. If an egg bobs to the surface or stands upright in water, it is old but not necessarily spoiled. You can still cook and eat it if you want — just crack it into a separate bowl first to check for any off smell or unusual appearance.

The white becomes runny and watery. In a fresh egg, the white is thick and clings to the yolk. In an old egg, the white spreads thin across the plate and the yolk flattens. Again, this is not a safety issue — it is a quality issue. A runny-white egg will cook, but the texture will not be as pleasant. If you are making a fried egg where appearance matters, use a fresher one. If you are baking or scrambling, an older egg works fine.

Throw an egg out if the shell is cracked or leaking, if it smells sour or off when you crack it open, or if you cannot remember when it was packed and it has been in your refrigerator for more than five weeks. A cracked shell lets bacteria in. A sour smell means fermentation has started. When in doubt, discard it — eggs are inexpensive, and the risk is not worth it.

Cooked eggs and hard-boiled eggs have a shorter window

A hard-boiled egg lasts three to four days in the refrigerator, not three to five weeks. Once you cook an egg, the protective shell is no longer a barrier. Bacteria can reach the cooked white and yolk more easily. Store hard-boiled eggs in a sealed container on a shelf (not the door) and use them within four days. If you are unsure how long a hard-boiled egg has been in the refrigerator, smell it before eating — a sulfurous or off odor means it has gone bad.

Scrambled eggs, fried eggs, and egg dishes like quiche or frittata also last three to four days. The same rule applies: store them in an airtight container, keep them cold, and use them within four days. Egg-based salads (like egg salad for sandwiches) last three to five days if they contain mayonnaise, which has preservative properties, but only two to three days if made without mayo.

Raw eggs separated into yolks and whites can be stored separately. Raw yolks last two to four days in a sealed container. Raw whites last seven to ten days. Neither should be frozen unless you are planning to use them in baking or cooking later — freezing changes the texture of a raw yolk and makes it unsuitable for frying.

What to do if your refrigerator temperature is unstable

If your refrigerator is running too warm or too cold, or if the temperature swings up and down, eggs will not last as long as the three to five week window suggests. A unit that fluctuates between 35°F and 50°F stresses eggs and shortens their life. Check your refrigerator temperature with a thermometer and adjust the dial if needed.

Most refrigerators have a dial or digital control on the inside wall. Turning it toward "colder" lowers the temperature; turning it toward "warmer" raises it. Make one small adjustment, wait 24 hours, and check the temperature again. It takes time for the whole unit to stabilize. If the temperature is still off, make another small adjustment. Large jumps can cause the compressor to cycle too often and waste energy.

If your refrigerator will not hold 40°F no matter how you adjust it, or if the temperature is erratic, the thermostat or compressor may need service. In the meantime, use eggs more quickly — assume a one to two week window instead of three to five weeks — and consider moving eggs to the coldest part of the unit (usually the back of the lowest shelf).

Frequently Asked Questions

Can I eat an egg that floats?

Yes. A floating egg is old but not spoiled. The air cell inside has grown larger, making it buoyant. Crack it into a bowl first to check for any sour smell or unusual appearance. If it looks and smells normal, you can cook and eat it. It will taste fine in scrambled eggs, baked goods, or cooked dishes, though the texture may not be ideal for frying.

What if I lost the carton and don't know when the eggs were packed?

If the eggs have been in your refrigerator for more than three weeks and you have no record of when they arrived, use the float test. Place one egg in a bowl of water. If it sinks and lies flat, it is fresh enough to use. If it floats or stands upright, it is old. You can still cook it if it smells normal, but if you are uncertain, discard it.

Do eggs go bad faster if I wash them?

Washing eggs at home removes the protective bloom (a natural coating) and can shorten their life. Eggs sold in U.S. grocery stores are already washed and sanitized at the facility, so you do not need to wash them again. If you do wash them, use them within two to three weeks instead of three to five weeks.

Can I freeze raw eggs to make them last longer?

Yes, but only if you plan to use them in cooking or baking. Crack the eggs into a bowl, beat them lightly, pour them into an ice cube tray or freezer container, and freeze. Thaw them in the refrigerator before using. Frozen eggs last three to four months. Do not freeze eggs in the shell — they will crack as the contents expand.

How do I know if my refrigerator is cold enough for eggs?

Use a refrigerator thermometer. Place it on a shelf in the main compartment (not the door) and leave it for at least four hours. It should read 40°F or below. If it reads higher, adjust the temperature dial and check again after 24 hours. Most eggs stored at 40°F or below will last the full three to five weeks from the packing date.