How to Tell If Eggs Are Bad
Learn how to tell if eggs are bad with smell checks, shell inspection, date labels, float test limits, storage tips, mistakes, and FAQs.
Quick Answer
To tell if eggs are bad, check the carton date, inspect shells for cracks or slime, crack each egg into a separate bowl, smell it, and discard any egg with an off odor, unusual appearance, or questionable storage history. Do not rely on the float test alone for safety.
What You Need
- Egg carton
- Clean bowl
- Trash or compost container where appropriate
- Soap and water
- Refrigerator thermometer optional
Safety Precautions
- When in doubt, throw the egg out.
- Wash hands, bowls, and surfaces after handling raw eggs.
- Discard cracked, slimy, moldy, or bad-smelling eggs.
- Keep eggs refrigerated according to local food safety guidance.
- Cook eggs thoroughly when serving young children, older adults, pregnant people, or immunocompromised people.
Step-by-Step Instructions
- Step 1
Check the carton
Look at the sell-by, use-by, or pack date and consider how the eggs were stored.
- Step 2
Inspect the shell
Discard eggs with cracks, powdery residue, slime, or mold.
- Step 3
Crack into a separate bowl
Check one egg at a time before adding it to a recipe.
- Step 4
Smell the egg
A spoiled egg usually has an unpleasant sulfur-like odor.
- Step 5
Check appearance
Look for unusual discoloration or strange texture.
- Step 6
Understand the float test
Floating may indicate age, but it does not prove an egg is unsafe or safe.
- Step 7
Decide conservatively
Discard any egg that seems questionable.
Practical Example
Example: You crack an egg into a small bowl before baking. It smells normal and looks normal, so you add it. The next egg smells off, so you discard it and wash the bowl.
Common Mistakes
- Relying only on the float test
- Cracking directly into batter
- Ignoring shell cracks
- Using eggs left unrefrigerated too long
- Not washing hands
- Serving undercooked eggs to higher-risk people
Troubleshooting
Egg floats in water
Treat it as an age clue, then crack and smell separately; discard if unsure.
Egg white is watery
It may be older, but smell and storage history matter more for safety.
Shell has residue
Discard if it looks slimy, powdery, moldy, or contaminated.
You already mixed a bad egg into food
Discard the mixture and clean surfaces and utensils.
Helpful Internal Links
FAQs
Is the float test enough?
No. It can suggest age, but smell, shell condition, storage, and appearance matter.
What does a bad egg smell like?
It often smells sulfur-like or rotten, even after cracking.
Can I use eggs after the date on the carton?
It depends on storage and local date-label meaning. Inspect carefully and discard questionable eggs.
Should eggs be refrigerated?
Follow the food safety guidance for your country and how the eggs were sold and processed.
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