How to Tell If an Egg Has Gone Bad—3 Foolproof Tests (Plus What “Expired” Really Means)

You’re halfway through making pancakes when you crack an egg into the bowl… and your nose wrinkles. That smell. Or maybe you’re cleaning out the fridge and find a carton with a date from “last season.” Suddenly, you’re stuck in that classic kitchen dilemma: Is this egg still safe—or is it a one-way ticket to food poisoning?
Good news: you don’t need to risk it. With a few simple, no-fail tricks, you can tell whether an egg is fresh, past its prime, or flat-out bad—in seconds. And spoiler: that weird “float test” your grandma swore by? It actually works.
Let’s crack this mystery wide open.
1. The Float Test: Science You Can Trust
Yes, it sounds like a middle school experiment—but the egg float test is legit. Here’s how it works:
Fill a bowl with cold water (enough to submerge an egg).
Gently place the egg in the water.
Watch what it does:
🟢 Sinks and lies flat on the bottom?
→ Very fresh—perfect for poaching, soft-boiling, or delicate dishes like custards.
🟡 Sinks but stands upright on the bottom?
→ Older but still safe to eat—great for hard-boiling, scrambling, or baking. Use within a day or two.
🔴 Floats to the surface?
→ Toss it. That air pocket inside has grown so large (from evaporation and gas buildup) that the egg is likely spoiled. Don’t crack it—just discard.
💡 Why it works: