Power Outage Food Safety Calculator
Find out how long your fridge and freezer food stays safe during a power outage.
Know what to keep and what to throw away.
The Danger Zone for food is 40°F to 140°F (4°C to 60°C). Bacteria multiply rapidly in this range — doubling every 20 minutes at 98°F (37°C).
How long appliances stay safe:
| Appliance | Keep Closed | How Long Food Stays Safe |
|---|---|---|
| Refrigerator | Yes | Up to 4 hours |
| Chest freezer (full) | Yes | 48 hours (2 days) |
| Chest freezer (half full) | Yes | 24 hours |
| Upright freezer (full) | Yes | 48 hours |
| Upright freezer (half full) | Yes | 24 hours |
The single most important rule: Keep the doors closed. Every time you open the refrigerator during a power outage, cold air escapes and the safe time window shortens.
Refrigerator food safety by outage length:
| Outage Duration | Status |
|---|---|
| 0–2 hours | All food safe — no action needed |
| 2–4 hours | Food likely still safe if door stayed closed |
| 4+ hours | Discard all perishables (meat, dairy, leftovers, eggs, etc.) |
Foods that MUST be discarded after 4 hours:
- Raw or cooked meat, poultry, seafood
- Milk, cream, soft cheese, yogurt, sour cream
- Cooked pasta, rice, potatoes, casseroles
- Mayonnaise, tartar sauce, hollandaise
- Opened cream-based sauces and soups
- Custards, puddings, cheesecake, mousse
- Fresh-cut fruits and vegetables
- Pies with meat, egg, or custard filling
Foods that are SAFE even after extended outage (pantry-stable):
- Unopened peanut butter, jelly, jam
- Hard and processed cheeses (not sliced)
- Fruit juices
- Canned goods (intact, not bulging)
- Bread, rolls, cakes, muffins, tortillas
- Butter and margarine
- Fresh uncut fruit and vegetables
- Vinegar-based dressings and condiments
- Dried herbs and spices
Frozen food rules:
If frozen food still contains ice crystals and feels refrigerator-cold (below 40°F / 4°C) — it is safe to refreeze. If it has thawed completely and been above 40°F for 2+ hours — do NOT refreeze. Cook immediately or discard.
“When in doubt, throw it out” — foodborne illness from spoiled food is a serious health risk. You cannot always smell or see bacteria in spoiled food.
Keeping food cold longer:
- Add bags of ice or dry ice to the refrigerator
- Move refrigerator items to a cooler with ice
- A full freezer stays cold longer than a half-empty one
- Freeze water bottles ahead of hurricane/storm season to use as cooling blocks