The Egg Float Test
The float test is the easiest and most reliable way to check an egg's freshness without cracking it open.
Sinks to bottom and lies flat
Very Fresh (1–7 days old). Perfect for poaching, frying, and baking.
Stands upright at bottom
Slightly Older (2–3 weeks old). Safe to eat, great for hard boiling!
Floats to top of water
Spoiled / Bad. Discard immediately. Gas has built up inside the egg.
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The Science: Why Eggs Float
An eggshell contains roughly 17,000 tiny pores. Over time, moisture evaporates through these pores and air enters, expanding the small air pocket inside the wider end of the egg. The larger the air pocket gets, the more buoyant the egg becomes!
COMMON QUESTIONS
Freshness Test — FAQs
Common questions about checking if eggs are fresh.
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Does a floating egg always mean it's bad?
What if an egg stands on end at the bottom?
Can you eat an egg that sinks to the bottom?