Place the egg into a bowl of cold water. The water level should be about 2 times higher than the egg.
Fresh eggs will sink to the bottom of the bowl and probably lie on their sides. Slightly older eggs (about one week) will lie on the bottom but bob slightly.
If the egg balances on its smallest tip, with the large tip reaching for the top, it's probably close to three weeks old. Eggs that float at the surface are bad and should not be consumed