If you want to try the egg float test using a mason jar, make it easy on yourself, and use a wide-mouthed jar so you can get the egg out easier. To complete the egg float test, just gently insert your egg into the water. If the egg sinks to the bottom but the fat end tilts up slightly - it's about a week old. The "float test" is a quick and easy way to see if those eggs in your refrigerator are still safe to use in recipes. Albeit, visual and smell detection is the most accurate determining method. Placing your egg in a glass of water will uncover it’s freshness. An egg can float in water when its air cell has enlarged sufficiently to keep it buoyant. The egg float test is an old fashioned way of telling approximately how old your eggs are. The eggs to … If the egg floats to the top, and bobs along the … If the egg sinks to the bottom but stands on its point, it's still good, but needs to be used soon - it's about three weeks old. If the egg sinks but floats at an angle or stands on end, the egg is a bit older (a week to two weeks old) but still okay to eat. A float test will remove the bloom and leave the eggs susceptible to bacteria penetration if left at room temperature. If the egg floats, it's too old and should be discarded. Of course, if any eggs float to the top, they shouldn't be eaten. Crack the egg into a bowl and examine it for an off-odor or unusable appearance before deciding to use or discard it. A cup of water works well, too. It is simple to do and only takes 5 minutes to check a carton of eggs. The egg float test is the easiest method you can use to determine if it’s is safe to eat. There's only one sure way to tell if an egg that floats is spoiled, and that's to crack it open in a bowl. Eggs that float to the top are often considered spoiled because more air has seeped in through the shell and decomposition may have started. 2. Start by filling a bowl with enough cold water to cover the egg plus two inches. When you buy your eggs at the grocery store, you can be certain they’re fresh—or at least, fresh enough to use. (Psst: Grandma loves this trick!) The air cell is found at the larger end of the egg between the inner and outer membranes. Decomposition, or spoiling, produces sulfur gas, the cause of the "rotten egg" smell. Soon after an egg is laid, it naturally cools, creating a small air space as its contents contract. Shake It. The science behind this is based on the fact that eggshells are semipermeable, which means air can get through. So the older the egg, the more air can penetrate its shell, causing it to float. I was just wondering because you said you grabbed them from the fridge like that's not something you normally do. How to Do the Egg Float Test. Hi, I stored some eggs in the fridge. When I did the float test, they floated. 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