Power Outage Duration Estimator
Select the cause, severity, and conditions of your outage to get a realistic estimate of how long you may be without power, so you can plan supplies accordingly.
Estimate your outage duration
Select the conditions that best match your situation for a personalized estimate.
2–6 hours
Equipment failure, small area, clear weather, urban.
Tips for success
- Refrigerators keep food safe for 4 hours if unopened; freezers for 24–48 hours.
- Report your outage to your utility even if you think they already know, it helps them pinpoint the fault.
- Sign up for your utility's outage notification alerts before the next storm.
- Keep a battery-powered or hand-crank radio to monitor official updates during extended outages.
- In winter, plan for heating alternatives if outage exceeds 6 hours in cold climates.
Practical note
These estimates are based on typical U.S. utility restoration data. Your actual outage may be shorter or longer. Always plan for the upper end of the range, it's better to have extra supplies you don't need than to run short.
How to use this estimator
Select the most likely cause of your outage, how many customers appear to be affected, current weather, and your area type. The estimator returns a probable duration range based on historical utility restoration data, along with guidance on food safety risk and generator need.
What drives outage duration
- Cause: A single blown transformer is the fastest to fix (often 2–4 hours). A hurricane that knocks down distribution lines across a region can take days to weeks.
- Scale: When thousands of homes lose power at once, utilities must prioritize transmission lines first, then distribution, then individual services, your home may be last.
- Access: Ice storms, flooded roads, and downed trees all slow crew response. Rural areas with a single access road may wait much longer.
- Time of day: Outages that start at 2 AM may not see a crew until daylight, adding hours to the estimate.
FAQ
How long before food in the fridge spoils?
Keep the refrigerator door closed and food stays safe for about 4 hours. A full freezer holds temperature for 48 hours; a half-full freezer for 24 hours. Use a cooler with ice for perishables if the outage extends beyond 4 hours.
Should I run my generator if the outage might only last a few hours?
For outages under 4 hours, a generator is usually unnecessary unless you have medical equipment, sump pump needs, or temperatures are extreme. Save your fuel for genuine extended outages.
What is the average U.S. power outage duration?
According to EIA data, the average U.S. customer experiences about 5–8 hours of outage time per year. Single-event outages vary enormously, from under an hour for routine equipment failures to weeks for major hurricane landfalls.
Will my utility restore the most customers first?
Yes. Utilities follow a triage approach: repair transmission lines and substations first (restores the most customers fastest), then work down to distribution lines, then individual services. Homes at the end of a long rural line are typically last.
How can I get a more accurate estimate?
Check your utility's outage map, most now show estimated restoration times (ETR) for each outage event. These real-time ETRs are far more accurate than any general estimator.