How To Know If Eggs Are Good Or Bad?

To tell if an egg is still good, use the float test. Place the egg in a glass of water. If it sinks to the bottom and lies flat, it is very fresh. If it stands upright on the bottom, it is still safe to eat but should be used soon. If it floats to the top, throw it away. The smell test is also reliable: crack the egg into a clean bowl and sniff. Any unpleasant or sulfur odor means it has gone bad. Always check for cracks or slimy shells before using.

How to Know If Eggs Are Good or Bad?

The most dependable method is the water float test. An egg’s shell is porous, and over time moisture and gases escape through tiny pores. As the egg ages, the air cell inside grows larger, making it more buoyant. When the air cell is big enough, the egg will float. A fresh egg sinks because the air cell is small.

Smell is the second best indicator. A bad egg releases hydrogen sulfide gas, which smells like rotten sulfur. Crack the egg into a clean dish first rather than directly into a hot pan. That way, you can check the odor and appearance without ruining your meal. Eggs that look normal but smell off are still spoiled — never use them.

Visual inspection also helps. A fresh egg white is thick and cloudy, and the yolk sits high and round. In older eggs, the white becomes thin and watery, and the yolk flattens. But these changes do not always mean the egg is unsafe — only smell and the float test can confirm spoilage.

What Does the Float Test Actually Tell You?

The float test measures an egg’s age, not its safety in every case. An egg that sinks is fresh and safe. An egg that stands on end is older but still safe for cooking, especially if you use it soon. An egg that floats should be discarded because bacteria may have entered through the enlarged air cell.

However, the float test is not perfect. A very old egg that has not been contaminated may still float but could be edible if cooked thoroughly. Conversely, a fresh-looking egg that sinks could still carry Salmonella if the hen was infected. The float test tells you about freshness, not about bacterial contamination. That is why proper cooking and handling matter more than any single test.

If you crack a floating egg and it looks and smells normal, some people still eat it. But the official recommendation from food safety agencies is to discard any egg that floats. The risk is small but not zero, and the safest choice is to throw it out.

How to Properly Store Eggs for Maximum Freshness

Eggs stay fresh longest when refrigerated at or below 40°F (4°C). In the United States, eggs are washed and must be refrigerated to prevent bacterial growth. Store them in their original carton rather than the refrigerator door, because the door is warmer and temperature fluctuates. The carton also protects eggs from absorbing strong odors from other foods.

Keep eggs away from raw meat or poultry to avoid cross-contamination. Do not wash eggs before storing — they already have a protective cuticle that washing removes. In the fridge, fresh eggs can last three to five weeks from the pack date. Hard-cooked eggs last about one week.

If you want to extend shelf life, you can freeze eggs, but not in the shell. Crack them into a freezer-safe container, beat lightly, and label with the number of eggs and date. Frozen eggs last up to one year.

Are Expiration Dates Reliable for Eggs?

Expiration dates on egg cartons are a guide, not a hard cutoff. In the U.S., the “sell-by” date is usually set at 30 days after the pack date. Eggs are often still safe to eat for several weeks after that date if they have been continuously refrigerated. The “use-by” date is an estimate of peak quality, not safety.

The pack date is a three-digit code (Julian date) printed on the carton. It tells you the day the eggs were packed, starting with January 1 as 001. Eggs can be sold for up to 30 days after that date. After purchase, they stay fresh for another two to three weeks in the fridge. Always use the float test and smell test instead of relying solely on dates.

Can You Eat Eggs Past the Expiration Date?

Yes, if they pass the float test and smell test. Many eggs remain safe to eat for three to five weeks after the pack date. The quality declines — the white becomes thinner and the yolk flatter — but the egg is still edible if cooked thoroughly. Hard-cooked eggs have a shorter shelf life because the protective cuticle is removed during cooking. Use hard-cooked eggs within one week.

Do not eat eggs that have been left at room temperature for more than two hours. Once refrigerated, keep them cold. If you are unsure, the safest rule is: when in doubt, throw it out. But a properly stored egg that sinks and smells fine is safe even after the date on the carton.

What About the Risk of Salmonella?

Salmonella is a bacteria that can contaminate eggs either inside the hen (before the shell forms) or on the shell from fecal matter. In the United States, about 1 in every 20,000 eggs is estimated to carry Salmonella. The risk is low but real. Refrigeration slows bacterial growth but does not kill the bacteria. Only cooking eggs to an internal temperature of 160°F (71°C) kills Salmonella.

To minimize risk, buy refrigerated eggs, check for cracks, and cook eggs until both white and yolk are firm. Avoid recipes that use raw or undercooked eggs, such as homemade mayonnaise or eggnog made with raw eggs, unless you use pasteurized eggs. People with weakened immune systems, pregnant women, young children, and older adults should be especially cautious.

Proper handling is more important than any freshness test for preventing illness. Wash hands after handling raw eggs, and clean surfaces that touched raw egg. Do not leave cooked egg dishes out for more than two hours.

Are Brown Eggs Better Than White Eggs?

No, the shell color has nothing to do with nutrition, freshness, or safety. Brown eggs come from hens with red feathers and earlobes; white eggs come from white-feathered hens. The nutritional content is nearly identical. Some people think brown eggs taste better or are healthier, but studies show no meaningful difference.

Brown eggs often cost more because the hens that lay them are larger and eat more feed, not because the eggs are superior. For freshness and taste, what matters is how the hens were raised and how the eggs were handled, not the shell color. Pasture-raised or cage-free eggs may have slightly different fatty acid profiles, but again, shell color is irrelevant.

If you want the freshest eggs, buy from a local farmer or farmer’s market where eggs are often unwashed (and can be stored at room temperature briefly). But even those eggs should be refrigerated at home. The float test and smell test work the same regardless of shell color.