Eggs are one of those fridge staples that people tend to use until they're gone without thinking much about how long they've been there. But questions do come up -- the carton got separated from the lid, the use-by date rubbed off, or you found half a dozen at the back of the shelf and you're not sure when they went in.
The answer is more straightforward than most people expect, but it does depend on how the eggs have been stored and whether they're the Australian commercial variety or backyard-fresh. Here's what you actually need to know.
The Short Answer
Commercial eggs last three to five weeks in the fridge from the pack date, or until the use-by date -- whichever comes first. CSIRO research shows clean eggs in their carton can stretch to six weeks, but quality starts dropping after that point. Australian Eggs confirms eggs stored correctly can last up to six weeks, though always check the use-by date first.
These timelines assume proper refrigeration -- consistent temperature below 4°C, in the original carton, away from strong-smelling foods.
Do Eggs Need to Be Refrigerated in Australia?
Yes. Commercial eggs here are washed before packing, which strips the natural protective cuticle (or bloom). This cuticle seals the shell's pores and blocks bacteria. Once it's gone, the shell becomes porous and refrigeration is essential to slow bacterial growth.
Australian commercial eggs aren't like those in some European countries, where hens are vaccinated against Salmonella and eggs skip washing. Here, refrigeration is non-negotiable from the moment they're packed. Leaving them on the bench at Australian room temperature -- especially in warmer months -- speeds up spoilage fast.
CSIRO data shows eggs at room temperature stay fresh for only nine days after laying. Higher temperatures shorten that window even more. Once you've refrigerated them, keep them cold. Moving eggs back and forth between fridge and bench causes condensation on the shell, which can push surface bacteria through the pores. If you pull eggs out for baking, use them straight away instead of returning them to the fridge multiple times.
How Long Do Different Types of Eggs Last?
| Egg Type | In the Fridge | Out of Fridge | Notes |
|---|---|---|---|
| Commercial eggs in carton (unwashed at point of lay, washed before packing) | 3--6 weeks from pack date | Up to 9 days | Always check use-by date first |
| Backyard / farm eggs (unwashed, cuticle intact) | Several weeks to months | 2--3 weeks at room temp | Cuticle intact; more resilient than washed eggs |
| Hard-boiled eggs (in shell) | 1 week | 2 hours maximum | Shell provides some protection; refrigerate promptly |
| Hard-boiled eggs (peeled) | 5 days in a covered container | 2 hours maximum | Store in water in a sealed container |
| Raw egg whites | 2--4 days in a sealed container | 2 hours maximum | |
| Raw egg yolks | 2--4 days covered with water in sealed container | 2 hours maximum | Cover with water to prevent skin forming |
| Cooked egg dishes (scrambled, omelette, quiche) | 3--4 days | 2 hours maximum | Treat like any cooked food |
How to Tell If an Egg Is Still Good
The float test
Fill a bowl or tall glass with cold water and gently lower the egg in.
- Sinks and lies flat on the bottom: Fresh egg with a small air cell. Good to use.
- Sinks but stands upright or tilts at an angle: The egg has aged -- the air cell has grown as moisture evaporated through the shell. Still safe to use but better for hard-boiling and baking than poaching or frying.
- Floats: The air cell has expanded significantly, indicating significant age or spoilage. Discard without cracking open.
The float test doesn't distinguish between an egg that's slightly old but still safe and one that's genuinely spoiled -- it tells you about the air cell size, which corresponds roughly to age. A floating egg should be discarded without question, but a sinking egg isn't necessarily guaranteed fresh either.
The smell test
Crack the egg into a separate bowl and give it a smell. A fresh, unspoiled egg has little to no smell at all. If it’s spoiled… you can tell it immediately by the sulphurous odour wafting off the egg.
If there's any doubt about smell, discard it. Do not crack a questionable egg directly into the dish you're preparing.
Visual check after cracking
- Fresh egg: The white is firm, thick, and holds its shape around a rounded, well-defined yolk.
- Older egg: The white spreads out flat and thin; the yolk is flatter and less defined. Still safe to use, but not ideal for dishes where presentation matters (poaching, frying).
- Spoiled egg: Pink, greenish, or iridescent whites; mould; or any off-colour yolk. Discard immediately.
Storing Eggs Properly
- Leave them in the carton: Besides keeping the eggs from breaking or knocking against one another in the truck, the carton also protects the eggs from soaking up smells of other food in the fridge (the egg shell is porous). The carton is the best place to store it -- even more than the egg tray by the door. With that said…
- Put them on a middle shelf, not the door. The fridge door is the warmest part of the fridge and gets temperature swings every time someone opens it. A middle shelf stays more stable, closer to 3°C.
- Don't let the temperature bounce around. Too many warm-up-and-cool-down cycles can degrade your eggs, both in the fridge and at the store. That’s why it’s best to grab your eggs at the tail end of your shopping trip so they don’t sit in a warm trolley for too long while you’re picking up the rest of your groceries.
- Don't wash eggs before you store them. If you've got backyard eggs with their cuticle intact, washing strips away the protective layer that keeps them stable without a fridge. Only wash right before you crack them open.
Eggs and Australian Food Safety
Australia regulates commercial eggs through FSANZ food safety standards. Farms have to meet requirements for hen health, hygiene, and how eggs are handled. Every carton sold has a use-by or best-before date printed on it.
For home storage, Australian Eggs says refrigerate right after purchase, leave them in the carton, and stick to the use-by date. That date is the final word on safety -- ignore any other storage rules you might've heard.
FAQ
Can I eat eggs after the use-by date?
The use-by date on Australian eggs is about safety, not quality. Once you're past it, float test and smell test before cracking one open. Throw out anything that floats or smells off. A sinking egg that still smells fresh a day or two after the date is usually fine, but the risk climbs with each extra day.
Why do some cartons show two different dates?
Most Australian cartons just have one. "Best before" is quality -- safe to eat but the egg's declining. "Use-by" is the hard stop for safety. FSANZ treats use-by as non-negotiable.
Does the hen's breed or diet affect how long eggs last?
Not much. What actually matters is what happens after the egg is laid -- whether the protective cuticle is still there, how quickly it got cold, and what temperature your fridge holds. A fresh backyard egg with its cuticle can outlast a commercial egg at room temperature, but once both are properly refrigerated, they perform the same.
Is it safe to freeze eggs?
Not in the shell -- they'll crack. Without the shell you're fine -- whisk whole eggs lightly or freeze whites and yolks separately in a sealed container. They'll keep for up to twelve months. Thaw in the fridge and use quickly. Fair warning: egg whites get a slightly different texture after freezing, so skip frozen eggs if texture matters for what you're making.
Does a warm fridge shorten egg shelf life?
Yes, it does. The timings above assume your fridge runs below 4°C. If it's sitting at 6°C or higher, you're cutting the safe storage window down. Grab an appliance thermometer to check (target around 3°C) and adjust if it's running warm. See our fridge temperature guide for the full picture.
Conclusion
Commercial eggs in Australia last three to five weeks in the fridge in their original carton, with the use-by date on the carton as the definitive guide. The float test, the smell test, and a visual check after cracking can confirm freshness when a date is unclear. Storing eggs on a middle shelf in their carton -- rather than in the door tray -- gives you the best chance of reaching that full shelf life.
If your fridge is struggling to stay below 4°C and you're finding food spoiling faster than it should, the fridge itself may need attention. We at National Appliance Repairs carry out fridge repairs across Sydney, Melbourne, Brisbane, Adelaide, and Perth -- call 1300 434 380 for a same-day assessment.
