The easiest and most well-known method to check the freshness of eggs without breaking them is the water test. However, there are several other methods that can help you determine if an egg is still safe to eat.
- Water test (dip test)
Fill a deep container or glass with cold water and carefully place the egg in it. Observe its position:
Egg position Freshness status Recommendation
Lies horizontally on the bottom Very fresh (a few days). Ideal for anything, even soft.
Stands vertically on the bottom Older (about 2-3 weeks). Still good, but use soon.
Floats on the surface Old / Rotten. Throw it away.
Why does this work? The egg has an air bubble under the shell. As the egg ages, the shell lets air in and moisture out, the bubble gets bigger and the egg starts to float.
- The shake test
Take the egg in your hand and shake it gently near your ear:
Silent: The egg is fresh. The contents are thick and hold firmly.
Splashing/swooshing: The egg is old. The structure of the white and yolk is thinning and hitting the shell because the air pocket is large.
- The light test
In a darkened room, hold a strong flashlight to the wider end of the egg (even the one on your cell phone will do).
In a fresh egg, you will only see a very small air gap (up to 6 mm).
In an old egg, the air bubble will be significantly larger and the yolk will move more when you turn the egg.
- Appearance after cracking
If you have already cracked the egg onto a plate, you can tell if it is fresh by its shape:
Fresh: The yolk is beautifully convex and the white forms a raised, compact ring around it.
Older: The yolk is flat and the white is watery, running to the sides.
Spoiled: Any unpleasant smell (typical hydrogen sulfide – “popcorn”) or unusual color (pink or rainbow white) is a clear signal to throw it away.
Tip: Older eggs that are already rising in the water but still stick to the bottom are ideal for hard-boiling. Thanks to a larger air bubble, they are much easier to peel than completely fresh ones.
Do you want advice on how to store eggs correctly so that they stay fresh as long as possible?