Written by Rona Sabatin
Content Writer, Johnson Creative · Updated
How long does food last in the fridge without power? About 4 hours if the door stays closed. A full freezer holds a safe temperature for about 48 hours, and a half-full freezer for about 24 hours. After 4 hours without power, throw out perishable fridge food like meat, milk, eggs and leftovers. When in doubt, throw it out.
The lights flicker back on. The fridge starts humming again. Now you have one question: is the food still safe?
The answer depends on a single number. How long was the power off? If you were asleep, at work or away, you may not know.
This guide gives you the official food safety times from FoodSafety.gov and the USDA. It shows you what to keep and what to toss. It also shows you how to estimate when the clock started next time.
| Appliance without power | How long food stays safe | Condition |
|---|---|---|
| Refrigerator | About 4 hours | Door kept closed. Toss perishables after 4 hours |
| Full freezer | About 48 hours | Door kept closed |
| Half-full freezer | About 24 hours | Door kept closed |
| Any perishable food above 40°F (4°C) | 2 hours | Toss after 2 hours above 40°F |
How Long Is Fridge Food Safe Without Power?
Food in a closed refrigerator stays safe for about 4 hours without power. After 4 hours, FoodSafety.gov says to throw out perishable food such as meat, poultry, fish, eggs and leftovers (FoodSafety.gov).
The 4 hours assume the door stays closed. Keep it closed as much as possible, because opening it lets cold air escape.
The key temperature is 40°F (4°C). Perishable food that sits above 40°F for more than 2 hours is not safe to keep.
How to check: Keep an appliance thermometer in the fridge. The USDA says the fridge should be at 40°F or below USDA FSIS. If you are not sure a food is cold enough, check it with a food thermometer.
Never taste food to find out if it is safe. Spoiled food can look and smell normal.
How Long Does Food Last in the Freezer Without Power?
A full freezer holds a safe temperature for about 48 hours. A half-full freezer holds it for about 24 hours. Both times assume the door stays closed FoodSafety.gov.
A full freezer lasts longer because the frozen food keeps itself cold. So if your freezer is half empty, move items close together. The USDA says this helps food stay cold longer.
A freezer should run at 0°F (-18°C) or lower in normal use. Keep an appliance thermometer in it too.
What Should You Throw Out After a Power Outage?
Throw out perishable food that sat above 40°F for more than 2 hours. Hard cheeses, butter, bread, uncut fruit and condiments like ketchup, mustard and jelly can stay. The table below follows the FoodSafety.gov chart.
| Fridge food after more than 2 hours above 40°F | Keep or toss |
|---|---|
| Raw or cooked meat, poultry, fish and seafood | Toss |
| Lunch meat, hot dogs, bacon and sausage | Toss |
| Milk, cream, sour cream, yogurt and soy milk | Toss |
| Soft cheeses (Brie, cottage, cream cheese, mozzarella) and shredded cheese | Toss |
| Hard cheeses (Cheddar, Swiss, Parmesan), butter and margarine | Keep |
| Fresh eggs, hard-boiled eggs, custards and puddings | Toss |
| Leftovers, casseroles, soups, cooked pasta, rice and potatoes | Toss |
| Uncut fresh fruit, uncut raw vegetables and opened fruit juice | Keep |
| Cut fruit, cut vegetables and cooked vegetables | Toss |
| Bread, rolls, tortillas and cakes without cream filling | Keep |
| Ketchup, mustard, jelly, pickles, peanut butter, soy and barbecue sauce | Keep |
| Creamy dressings and opened spaghetti sauce | Toss |
| Opened mayonnaise, tartar sauce and horseradish | Toss if above 50°F for more than 8 hours |
When in doubt, throw it out. Look at each item on its own. A few dollars of food is not worth a case of food poisoning.
Can You Refreeze Food That Thawed During an Outage?
Yes, if it still has ice crystals or is at 40°F or below. The quality may drop, but the food is safe to refreeze FoodSafety.gov.
| Freezer food after a power outage | Still has ice crystals or is 40°F or below | Held above 40°F for more than 2 hours |
|---|---|---|
| Meat, poultry, seafood, soups and stews | Refreeze | Toss |
| Casseroles, frozen meals and cheesecake | Refreeze | Toss |
| Ice cream and frozen yogurt | Toss | Toss |
| Hard cheese | Refreeze | Refreeze |
| Bread, cakes without custard, waffles and pancakes | Refreeze | Refreeze |
| Frozen fruit and juice | Refreeze | Refreeze, but toss if moldy, slimy or yeasty smelling |
| Frozen vegetables | Refreeze | Toss if above 40°F for more than 6 hours |
Ice cream and frozen yogurt are the exception. Always throw them out after an outage, even if they still have ice crystals.
How Do You Know When the 4-Hour Clock Started?
You need the time the power went out, not the time you noticed. Without it, the 4-hour and 48-hour rules turn into guesses.
That is the hard part. Many outages happen at night, during the workday or while you are traveling. You come home, the clocks are blinking, and you have no idea if the power was off for 30 minutes or 6 hours.
Ways to find the start time:
- Your utility. Many utilities post outage times on their outage map or app. Check yours.
- Blinking clocks. A microwave clock that reset to 12:00 only tells you the power went out, not when.
- A power outage monitor. It texts or emails you when the power goes out and again when it comes back. The alert times help you estimate how long the power was off.
How Do Power Pal and Power Pal MAX Track an Outage?
Power Pal checks in with the Johnson Creative cloud server every minute over your WiFi. When the power fails, the check-ins stop. By default, the server sends your text or email after 6 missed minutes. When power returns, you get a restoration message Power Pal.
The alert comes from the cloud server, not from your house. That is why it still reaches you while your router is off.
Example: Your phone shows a Power Pal outage text at 9:06 PM and a restoration text at 12:40 AM. The power went out a few minutes before 9:06 PM and came back at 12:40 AM. That is about 3 hours and 40 minutes. Your closed fridge stayed under the 4-hour limit. Confirm with the fridge thermometer, and the food can stay.
Know when the power went out, even when you are away
Both send a text or email when the power fails and again when it returns. Standard alerts have no subscription fee.
Power Pal
$49.99
- Outage and power-return alerts by SMS and email
- Checks in every minute; alerts after 6 minutes without a check-in (default, adjustable)
- No app needed. Set up in a web browser over WiFi
- Plug into an outlet near the fridge or freezer
Power Pal MAX
$74.99
- Outage and power-return alerts by SMS and email
- Heavy-duty 15A rating for larger appliances
- Alerts can go to more than one person
- No subscription for standard alerts
Neither device is an alarm or a backup power source. They tell you about the outage. A thermometer decides what food to keep.
Where to plug it in: Use an outlet near the fridge or freezer, ideally on the same circuit. Then a tripped breaker on that circuit triggers an alert too, not just a neighborhood outage.
What it will not do: Power Pal does not keep food cold, back up your power or measure the temperature inside your fridge. It tells you when the power went out and when it came back. Your thermometer still makes the final keep-or-toss call.
For more on choosing an outage alert, see our guide to power failure alarms and alerts.
How Can You Keep Food Cold Longer During an Outage?
Keep the doors closed, group food together and add cold from outside the fridge. These steps come from the USDA’s emergency food safety guide USDA FSIS.
- Keep the doors shut. Decide what you need before you open the door, then close it fast.
- Group frozen food together. Packed items stay cold longer than scattered ones.
- Use dry ice or block ice for long outages. The USDA says 50 pounds of dry ice should hold a full 18-cubic-foot freezer for 2 days. Handle dry ice with gloves and keep the room ventilated.
- Move fridge food to a cooler. If the outage may last more than 4 hours, pack milk, meat and leftovers in a cooler with ice or frozen gel packs.
- Do not store food outside in winter. Sun and changing temperatures can warm it. Instead, freeze containers of water outside and use them as ice.
What Should You Do Before the Next Outage?
Set up three things now: thermometers, ice and an alert. Prepare them before the next outage.
- Put an appliance thermometer in the fridge and the freezer. Target 40°F or below in the fridge and 0°F or below in the freezer.
- Freeze water. Fill containers with water and keep them in the freezer. They fill empty space and work as ice during an outage.
- Keep a cooler and gel packs where you can find them in the dark.
- Add a power outage alert if you are often away from home. The alert times help you estimate the outage window instead of guessing. If you leave home for long trips, our guide on how to monitor your home while on vacation covers the rest of the house.
What Are the Key Takeaways?
- A closed fridge keeps food safe for about 4 hours without power.
- A full freezer holds for about 48 hours. A half-full freezer holds for about 24 hours.
- Toss perishable food that sat above 40°F for more than 2 hours.
- Refreeze food that still has ice crystals or is at 40°F or below.
- Never taste food to test it. When in doubt, throw it out.
- The rules only work if you know when the power went out. Outage and restoration alerts help you estimate it.
What Are the Most Common Questions About Food in a Power Outage?
Is fridge food safe after 6 hours without power?
No, not perishable food. FoodSafety.gov says to throw out perishables like meat, milk, eggs and leftovers after 4 hours without power. Hard cheese, butter, bread, uncut fruit and most condiments can stay. A full freezer that stayed closed should still be safe, since it holds for about 48 hours.
How long does a freezer keep food frozen without power?
About 48 hours if it is full and about 24 hours if it is half full, as long as the door stays closed. Group frozen items together to help them stay cold longer.
Can I refreeze food that partly thawed?
Yes, if it still has ice crystals or is at 40°F or below. The quality may drop, but it is safe. Throw out thawed ice cream and frozen yogurt.
Should I open the fridge to check on the food during an outage?
No. Keep the door closed as much as possible. Each opening lets cold air out and shortens the 4-hour window. If the outage may last more than 4 hours, open it once to move perishables into a cooler with ice.
How do I know how long the power was out?
Check your utility's outage map or app, which often lists outage times. A power outage monitor such as Power Pal also texts or emails you when the power goes out and when it comes back, so you have both times.
Will a Power Pal alert reach me if my WiFi is down during the outage?
Yes. The alert comes from the Johnson Creative cloud server when Power Pal stops checking in, so it does not need your home internet during the outage. Power Pal does need WiFi to check in while the power is on, so an internet outage alone can also stop the check-ins.
Does homeowners insurance cover food lost in a power outage?
It depends on your policy. Some policies cover food spoilage and some do not. Before you throw anything out, take photos and write a list of what you lose, then check with your insurer.
What Is the Safest Way to Handle Food After an Outage?
Find out how long the power was off, check your thermometers, then sort food with the keep-or-toss table. If the fridge stayed closed for less than 4 hours, most food is fine. If you cannot tell how long it was off, treat perishables as unsafe.
Next time, you do not have to guess. Power Pal texts you when the power goes out and again when it comes back, with no subscription for standard alerts. See Power Pal or compare Power Pal MAX for deep freezers and larger appliances.
About the Author
Rona writes guides for Johnson Creative on router rebooting, internet reliability and home monitoring. Product details come from Johnson Creative's manuals and support articles. AI tools help with drafting, and every guide is reviewed and edited by Rona before publishing.
