If it sinks but stands upright, it is still safe to eat but not as fresh and should be used soon.
If it floats to the surface, it is no longer fresh and should be discarded.
This quick test takes only seconds and gives a clear indication of an egg’s freshness.Advertisement
Why Nana’s Method Works
This method works because of changes in the egg’s air cell. Over time, moisture slowly escapes through the porous shell while air enters, causing the air pocket to expand. As the air cell grows, the egg becomes more buoyant. Fresh eggs, with smaller air pockets, are denser and sink flat, while older eggs stand upright or float. This simple science explains why Nana’s trick is so reliable.
Comparing Other Egg Freshness Testing Methods
While Nana’s water test is one of the most popular, other methods can also indicate freshness:
