Global Araç
Food Storage Shelf Life
USDA FoodSafety.gov yönergelerine dayalı tahminler. “Şüphede kalınca çöpe atın”— herhangi bir tablodan önce burnunuza ve gözlerinize güvenin.
Look up safe storage durations for common foods in fridge (typically 32-40°F) and freezer (0°F or below). Pick a food category — fresh meat, cooked leftovers, dairy, eggs, produce, deli items, prepared foods — and enter purchase or cook date. Tool returns USDA-recommended “good until” dates plus storage tips: which foods freeze well (most cooked dishes, raw meat, bread, butter), which don’t (lettuce, raw eggs in shell, mayonnaise-based salads), and signs of spoilage that mean throw away regardless of date.
USDA standard guidelines for fridge storage: raw poultry 1-2 days, raw ground meat 1-2 days, raw whole-cut beef/pork3-5 days, fresh fish 1-2 days, cooked leftovers 3-4 days, hard-boiled eggs 1 week, opened lunch meat 3-5 days, milk past sell-by typically 5-7 days if stored cold (sell-by is retailer guidance not safety), opened yogurt 7-10 days, hard cheese 3-4 weeks. Freezer extends most categories dramatically: raw meat 4-12 months, cooked dishes 2-3 months, bread 3 months, butter 6-9 months. Quality declines past these dates (freezer burn, off-flavors) but food remains technically safe in a 0°F freezer indefinitely.
Spoilage cues to know: Smell is the best indicator for raw meat, fish, and dairy — a sour, off, or sulfurous smell means throw away regardless of date. Texture changes matter — slimy poultry, fuzzy bread, watery produce. Color changes are mixed — slight gray on raw beef from oxidation is normal (still safe); green or rainbow sheen on cooked meat is bacterial. Mold: hard cheese can be saved by cutting 1+ inch around the mold (mold doesn’t penetrate deeply); soft cheese, bread, and most fruits with mold should be discarded entirely (mold filaments penetrate widely). The two-hour rule: perishable food shouldn’t be at room temp longer than 2 hours (1 hour above 90°F). Bacteria multiply rapidly in the 40-140°F “danger zone.” Refreezing thawed meat is generally safe if it was thawed in the fridge (not on the counter), though quality suffers.
Nasıl Kullanılır
- Pick food category: raw meat, cooked dish, dairy, eggs, produce, deli, prepared food.
- Enter the date you bought (or cooked) the food.
- Read recommended fridge 'good until' date and freezer 'good until' date.
- Read storage tips: airtight container, original packaging, freeze in portions, etc.
- Check spoilage cues: smell test (most reliable for meat/fish/dairy), texture, color, visible mold.
- When in doubt, throw it out. Foodborne illness is far worse than the cost of replacement food. The 'sniff test' isn't always reliable — some pathogens (Listeria, some E. coli) don't change smell or appearance.
Ne Zaman Kullanılır
- Cleaning out the fridge — knowing which items are still good vs need to be tossed.
- Meal planning — knowing how long ingredients last helps you plan to use them in time.
- Bulk shopping (Costco) — checking whether you can realistically use perishables before they expire.
- Leftover handling — 3-4 day fridge limit for cooked dishes is shorter than most people remember.
Ne Zaman Kullanılmaz
- Pre-cooked / commercial foods with explicit expiration dates — follow the package date.
- Fermented foods (kimchi, sauerkraut, pickles, kombucha) — those have different rules; they're preserved by fermentation not refrigeration.
- Specialty / artisan foods (raw oysters, cured meats, sushi) — those have specific handling guidelines from the producer; consult those, not generic charts.
- Substituting for food-safety judgment — when in doubt, smell, look, and trust your instincts; charts are guidelines, not absolutes.
Yaygın Kullanım Senaryoları
- Pre-decision sanity-check on inputs and outputs
- Educational use — demonstrating the underlying concept
- Onboarding a colleague who needs the same calculation/conversion
- Verifying a number or output before passing it on
Sık Sorulan Sorular
What's the difference between 'sell by,' 'use by,' and 'best by'?
'Sell by' is for retailers — tells the store when to remove from shelves. Food is generally safe past this date for several days to weeks. 'Use by' is the manufacturer's quality date — food is at peak quality until this date and may decline after, though often still safe. 'Best by' is similar to 'use by' for non-perishable items. None are federal safety standards (except infant formula, which has a strict 'use by'). Most food is safe well past these dates if stored properly. Use sniff/look/touch tests rather than dates alone.
How long do leftovers actually last in the fridge?
USDA says 3-4 days. After that, bacterial growth even at fridge temperatures (40°F) becomes risky. Some foods last longer: hard cheese 3-4 weeks, hard-boiled eggs 1 week, cooked rice 4-6 days, cooked beans 5 days. Foods to use fast (1-2 days): cooked seafood, poultry-based dishes, anything with mayonnaise or cream. Freeze leftovers within 3-4 days for longer storage; cooked dishes freeze well 2-3 months. Label container with date — 'I think it was Thursday' is a recipe for food poisoning.
Can I freeze and refreeze meat?
Yes if you thawed it in the fridge (not on the counter). USDA explicitly says fridge-thawed meat is safe to refreeze. Quality suffers from each freeze cycle (texture becomes more crumbly), but safety is maintained. Counter-thawed meat should not be refrozen because it spent time in the bacterial 'danger zone' (40-140°F). For best quality: freeze meat in portions you'll actually use; thaw what you need; don't thaw a 5-lb roast and refreeze 4 lbs.
Is it safe to eat eggs past the date?
Usually yes. Fresh eggs in their shell last 3-5 weeks past purchase if refrigerated. The USDA test: place egg in a glass of cold water. Sinks and lays on side = fresh. Sinks and stands upright = older but still good. Floats = throw out (gas built up inside indicates spoilage). Cracked eggs should be used within 2 days. Hard-boiled eggs last 1 week in shell, 1 week peeled if covered. Egg salads with mayo last 3-4 days. Egg dates on cartons are typically 3-5 weeks past pack date; the eggs are still good 2-3 weeks past that.
Why does milk smell sour before its 'sell by' date sometimes?
Temperature exposure during transport or display. Milk should stay below 40°F continuously from dairy to your fridge. Brief exposure to warmer temps (left out in cart, on warm truck) accelerates spoilage. Drug-store and gas-station milk often spoils faster than supermarket milk for this reason. The 'sell by' date assumes ideal cold-chain handling. Conversely, milk that's been kept very cold (back of fridge, not in door) often lasts 7-10 days past sell-by. If milk smells off, throw it out regardless of date.
What about freezer burn?
Freezer burn is moisture loss and oxidation on frozen food, causing dry, leathery, discolored patches. Food with freezer burn is safe to eat but quality is degraded — texture is unpleasant, flavor is muted. Cut off freezer-burned portions before cooking; the unaffected center is fine. Prevention: vacuum sealing (best), heavy freezer bags with air pressed out, double-bagging. Freezer burn happens fastest at fluctuating temperatures (door foods, frequent opens). Stable -10°F to 0°F deep freezer slows it dramatically vs typical refrigerator-freezer compartment at 0-10°F.