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Americans throw away roughly 30% of their eggs before the carton is empty, according to estimates from the USDA’s Economic Research Service. Most of those eggs are perfectly safe to eat. The sell-by date stamped on the carton is a store inventory tool, not a safety deadline, and learning a few quick checks can save you money and cut food waste at the same time.
What Is the Fastest Way to Check If an Egg Is Still Good?
The water test is the fastest and most reliable home method. Place the egg in a bowl of cold water. A fresh egg sinks and lies flat on its side. An egg that stands upright on the bottom is older but still safe. An egg that floats has developed enough gas inside the shell to be considered spoiled and should be discarded immediately.
This works because eggshells are porous. Over time, moisture escapes and air seeps in through thousands of tiny pores, enlarging the air cell at the wide end of the egg. The USDA notes that a fresh egg typically has an air cell no larger than 1/8 inch deep. As the egg ages, that pocket grows, eventually making the egg buoyant enough to float. I keep a deep cereal bowl next to my egg carton specifically for this test, and it takes about five seconds per egg.
The water test does not tell you whether an egg has been contaminated with Salmonella. That is an invisible risk unrelated to freshness. According to the FDA, roughly 1 in 20,000 eggs may carry Salmonella enteritidis internally. Cooking eggs to an internal temperature of 160 degrees Fahrenheit eliminates this risk regardless of how old the egg is. For a broader overview of food safety fundamentals, our food storage and safety guide covers the core principles that apply to every ingredient in your kitchen.
Does the Sell-By Date on the Carton Actually Matter?
The sell-by date tells the store when to pull the carton from the shelf. It is not an expiration date. According to the USDA Food Safety and Inspection Service, eggs stored in the refrigerator at 40 degrees Fahrenheit or below are typically safe to eat for three to five weeks after the purchase date, which often extends well past the printed sell-by date.
Federal regulations require a pack date on every USDA-graded carton, printed as a three-digit Julian date (001 for January 1, 365 for December 31). The sell-by date, when present, cannot exceed 30 days past the pack date in most states, though a few states set shorter windows. If you know how to read the Julian date, you can track exactly how old the eggs are regardless of the sell-by stamp. An egg packed on day 200 and refrigerated continuously is still within its safe window on day 235.
I prefer to rely on the Julian date and the water test rather than the sell-by date alone. The sell-by date assumes average handling conditions, but your eggs may have been stored better or worse than average depending on how quickly you got them home and whether they stayed cold during transport.
What Should a Fresh Egg Look and Smell Like When Cracked?
A fresh egg cracked onto a flat plate has a tall, firm yolk that sits high and a thick white that clings tightly around it. The white should be slightly cloudy, which indicates freshness rather than a problem. A spoiled egg produces an unmistakable sulfur smell the instant the shell breaks, and the white will be thin, watery, and spread across the plate.
The crack-and-sniff test is the definitive check. No amount of floating or candling can replace what your nose tells you when the shell is open. A fresh egg has almost no odor at all. Any hint of sulfur, ammonia, or sourness means the egg should go straight into the trash. According to the USDA, off-odors develop as bacteria break down proteins inside the egg, producing hydrogen sulfide gas.
Color variations in the yolk, from pale yellow to deep orange, reflect the hen’s diet and have nothing to do with safety or freshness. A blood spot on the yolk is also harmless and can be removed with a knife tip. The Egg Safety Center confirms that blood spots occur naturally during egg formation and do not indicate contamination. If you want to understand how proper refrigeration slows these aging processes, take a look at how we explain shelf life for cooked foods like rice using the same USDA guidelines.
How Should You Store Eggs to Keep Them Fresh Longest?
Store eggs in their original carton on a shelf inside the refrigerator, not in the door. The door is the warmest part of the fridge and experiences the most temperature fluctuation every time you open it. The USDA recommends keeping eggs at a steady 40 degrees Fahrenheit or below, and the carton protects them from absorbing strong odors from other foods.
| Storage Method | Expected Shelf Life | Notes |
|---|---|---|
| Refrigerator (in carton, on shelf) | 3-5 weeks past purchase | USDA recommended method |
| Refrigerator (door compartment) | 2-3 weeks past purchase | Temperature fluctuation shortens life |
| Room temperature (USA, washed eggs) | Do not store unrefrigerated | USDA-washed eggs lose their protective cuticle |
| Hard-boiled, refrigerated | 7 days | Peel or unpeeled, keep covered |
| Frozen (raw, out of shell) | Up to 12 months | Beat yolks and whites together or freeze separately |
In the United States, commercially sold eggs are washed and sanitized, which removes the natural cuticle that seals the pores. This is why American eggs must be refrigerated, while eggs in many European countries are sold at room temperature with the cuticle intact. Once an egg has been refrigerated, it must stay refrigerated. Moving a cold egg to room temperature causes condensation on the shell, which can allow bacteria to be drawn through the pores. The same principle of consistent cold storage applies to refreezing thawed meat safely.
Can You Freeze Eggs for Later Use?
You can freeze raw eggs for up to 12 months, but not in the shell. Crack the eggs into a freezer-safe container, beat the yolks and whites together gently, and seal tightly. For recipes that need only whites or only yolks, freeze them separately. Add a pinch of salt or sugar to yolks before freezing to prevent them from becoming gelatinous, as the USDA recommends.
Freezing is a practical solution when you have more eggs than you can use before they age out. I freeze beaten eggs in silicone ice cube trays, with each well holding roughly one large egg’s worth. Once frozen solid, I pop them out and transfer to a labeled freezer bag. They thaw overnight in the refrigerator and work well in scrambles, baked goods, and casseroles. Hard-boiled eggs do not freeze well because the whites turn rubbery and watery upon thawing.
Our research methodology details how we verify storage guidelines against USDA and FDA primary sources before publishing any recommendation on this site.
What About the Candling Method?
Candling means holding an egg up to a bright light source in a dark room to see the interior through the shell. Commercial egg graders use this technique with specialized equipment to check for cracks, blood spots, and air cell size. At home, a bright flashlight pressed against the wide end of the egg in a dark room shows you the air cell and can reveal whether the yolk moves freely, which indicates an older egg.
For most home cooks, candling is more effort than it is worth compared to the water test. The water test gives you a clear pass-or-fail result in seconds, while candling requires a dark room, a strong light, and some practice to interpret what you see. That said, candling is useful if you raise backyard chickens and want to check eggs before incubation, since it reveals whether an embryo is developing. For everyday kitchen purposes, the water test followed by the crack-and-sniff test covers everything you need to know.
- Can you eat eggs after the expiration date?
- If the eggs have been continuously refrigerated at 40 degrees Fahrenheit, they are typically safe for three to five weeks after purchase, often past the printed date. Use the water test and crack-and-sniff test to confirm freshness before cooking.
- Why do some eggs have two yolks?
- Double yolks occur when a hen releases two yolks in quick succession and they end up in the same shell. This is common in young hens whose reproductive cycles have not fully regulated. Double-yolk eggs are perfectly safe to eat.
- Is it safe to eat eggs with a green ring around the yolk?
- A green ring around the yolk of a hard-boiled egg is caused by a reaction between iron in the yolk and sulfur in the white during prolonged cooking. According to the USDA, the egg is safe to eat. To prevent it, avoid overcooking and cool eggs promptly in ice water after boiling.
- Do brown eggs last longer than white eggs?
- Shell color has no effect on shelf life, nutritional value, or safety. Brown and white eggs from the same farm, stored under the same conditions, last equally long. The color difference comes from the breed of hen.
- USDA Food Safety and Inspection Service. “Shell Eggs from Farm to Table.” fsis.usda.gov
- FDA. “What You Need to Know About Egg Safety.” fda.gov
- American Egg Board / Egg Safety Center. “Egg Safety Reference.” eggsafety.org
- USDA Economic Research Service. “Food Loss and Waste.” ers.usda.gov
- Penn State Extension. “Egg Quality and Safety.” extension.psu.edu
