How do you know if an egg has gone bad?

Answer by  thattractorguy (2970)

Check the sell by date or expiration date on the eggs. You can still use eggs for up to one week after the sell by date, but don't use them if there is an expiration date on them that you are past.

Answer by  NancyTell843 (156)

Put the eggs in a pan of water that is deep enough to cover the eggs. If the eggs float, then they are no longer fresh. Over time, the insides of eggs creates gas. The gas forms a bubble between the white and the shell, and this will cause an old egg to float in water.