In addition to the float test, another way to tell if an egg is bad without cracking ... in the fridge before going bad? Hard-cooked eggs are good for seven days when left in their shells.

This quick and easy test will tell you how fresh your eggs are! There’s an easy, smart way to test if your eggs are still fresh without having to rely on carton dates or numbers: do a float test!

How to test egg freshness at home If you want to check if your eggs are still good before you crack them, you can perform a simple float test with your egg and a glass of cold water.