Egg Storage & Shelf-Life Calculator

Two different eggs, two different clocks

A washed egg refrigerated at 45°F or below keeps 3–5 weeks, per USDA — but left on the counter it has to go back in the fridge (or get tossed) within 2 hours. An unwashed backyard egg with its bloom intact flips that entirely: about 2 weeks safely on the counter, or roughly 3 months refrigerated.

How this works

The reason washing changes everything comes down to one thing: the bloom, or cuticle — a natural coating a hen applies to the egg as she lays it. The bloom seals the shell's pores, blocking bacteria from getting in and slowing moisture loss from getting out. Washing an egg removes it, and once it's gone, the egg is exposed in a way it wasn't before.

For washed eggs — every egg sold in a US grocery store, plus any of your own eggs you rinse — USDA Food Safety and Inspection Service's "Shell Eggs from Farm to Table" gives the figures: refrigerated at 45°F or below, good for 3 to 5 weeks; left at room temperature, refrigerate within 2 hours or discard. That 2-hour window isn't conservative padding — it's how quickly bacteria can multiply on a shell with no protective coating left.

For unwashed eggs straight from your own hens with the bloom still on, Ohio State University Extension (Fairfield County) publishes a different set of numbers: up to 2 weeks at room temperature, or up to about 3 months refrigerated. This is a genuinely different publication measuring a genuinely different egg — don't mix the two figures. The moment you wash an unwashed egg, USDA's washed-egg clock starts, whatever the calendar says it had left before.

Why Europe does this differently

This is also the reason American and European grocery-store advice looks contradictory at first glance. US regulation requires commercial eggs to be washed and sanitized, so USDA's guidance — including the 2-hour room-temperature rule — is written for that egg. Many European countries don't wash commercial eggs, so the bloom survives to the store shelf and unrefrigerated counter storage is standard there. Same egg, two different handling chains, two different safe-storage rules to match.

A worked example

You collect eggs from your coop on a Monday and don't wash them. Left on the kitchen counter, they're good through roughly the Monday two weeks later. Put the same unwashed eggs straight in the fridge instead and you're looking at closer to three months before quality starts to suffer. Wash them before storing — even a quick rinse before refrigerating — and you've switched clocks: now it's USDA's 3-to-5-week refrigerated window, or 2 hours if they're back out on the counter.

The practical takeaway most keepers land on: don't wash eggs until right before you use them. A visibly dirty egg can usually be dry-brushed clean without breaking the bloom at all; save the wet wash for the morning you're cracking it into a pan.

Frequently asked questions

How long do fresh eggs last in the fridge?

For washed eggs (all US store-bought eggs, and any of your own eggs you wash) — 3 to 5 weeks refrigerated at 45°F or below, per USDA Food Safety and Inspection Service. For unwashed backyard eggs with the bloom intact, Ohio State University Extension puts refrigerated storage at up to about 3 months — considerably longer, because the cuticle that washing removes is what limits a washed egg to weeks rather than months.

Do I need to refrigerate eggs from my own flock?

Only once you wash them. An unwashed egg still has its bloom (cuticle) intact — a natural coating the hen applies that blocks bacteria and slows moisture loss — and can sit safely at room temperature. The moment you wash an egg, that protection is gone and USDA guidance applies: refrigerate within 2 hours or the egg needs to be discarded.

Why do American and European eggs get stored so differently?

It comes down to washing. US regulations require commercial eggs to be washed and sanitized, which strips the bloom and means the eggs must be refrigerated from that point on — hence the USDA's 2-hour room-temperature limit. Many European countries don't wash commercial eggs, so the bloom stays intact and unrefrigerated counter storage is normal there. It's the same egg, handled two different ways, with two different safe-storage rules to match.

How long can unwashed eggs sit on the counter?

About 2 weeks, per Ohio State University Extension — noticeably longer than a washed egg gets before it must go in the fridge, again because the bloom is still doing its job. Refrigerating unwashed eggs instead of counter-storing them extends that further, to roughly 3 months by the same source.

Should I wash my eggs before storing them?

Not until you're about to use them, if you can help it. Washing removes the bloom and shortens how long the egg can safely go without refrigeration — from weeks at room temperature down to a 2-hour window. If an egg is visibly dirty, a light dry-brush is usually enough; a wet wash is best done right before cooking, not right after collecting.

How can I tell if an egg has gone bad?

The float test is the quick check: an egg that sinks and lies flat is very fresh; one that stands upright or floats has lost enough moisture through the shell (air cell has grown) to be past its best, and a floater should be discarded rather than risked. A strong sulphur smell on cracking is the other unmistakable sign — trust your nose over any date estimate.