How Many Watts Does a Refrigerator Use? (And What Can Run It)
Most modern fridges use about 100 to 250 watts while running and 1 to 2 kWh a day, with a startup surge several times higher. Here's how to find yours and size backup power.
The short answer: a typical modern full-size refrigerator uses roughly 100 to 250 watts while its compressor is running, and about 1 to 2 kWh per day overall. When the compressor starts, it can briefly draw several times its running watts.
Those three numbers matter for different reasons:
- Running watts tell you the steady load.
- Startup (surge) watts tell you whether a generator or power station can start it.
- Daily kWh tells you how big a battery you need and what it costs to run.
Typical refrigerator power use
| Type | Typical running watts | Typical daily use |
|---|---|---|
| Mini fridge | About 50 to 100 W | About 0.5 to 1 kWh |
| Top-freezer, full size | About 100 to 200 W | About 1 to 1.5 kWh |
| Side-by-side or French door | About 150 to 250 W | About 1.5 to 2 kWh |
| Older fridge (15+ years) | Often higher | Can be 2 to 4+ kWh |
These are rough ranges. Size, age, features like ice makers, the room temperature and how often you open the door all change the numbers.
How to find your fridge’s exact numbers
1. Check the EnergyGuide label
New fridges in the U.S. come with a yellow EnergyGuide label showing estimated yearly kWh. Divide by 365 for daily use. For example, 500 kWh a year is about 1.4 kWh a day. You can also look up your model on the Energy Star or manufacturer site.
2. Check the nameplate
Inside the fridge, usually on a side wall or behind the crisper, there’s a label with volts and amps. Multiply them for maximum watts: 120 volts × 6 amps = 720 watts. That’s a worst-case number, often including the defrost heater, not what the fridge uses most of the time.
3. Measure it
The most accurate way is a plug-in electricity monitor, like a Kill A Watt. Plug the fridge into it for 24 hours to see real daily kWh and the running watts.
Why the startup surge matters
A compressor motor needs a burst of power to get going, often several times its running watts for a fraction of a second. If your generator or power station can’t supply that burst, it will trip or shut down even though it can easily handle the running load.
Rule of thumb for backup power: choose a power station or generator with a surge or starting rating of at least 1,500 to 2,000 watts for a full-size fridge. Higher is safer, especially if other things are plugged in.
How long can backup power run a fridge?
Divide the battery’s usable capacity by your fridge’s daily use. Power stations lose some energy converting battery power to AC, so use about 85% of the rated capacity.
Example: a 1,000 Wh power station × 0.85 = about 850 Wh usable. With a fridge using 1.4 kWh (1,400 Wh) a day, that’s roughly 850 ÷ 1,400 = about 0.6 days, or around 14 hours.
| Power station size | Fridge using 1 kWh/day | Fridge using 1.5 kWh/day | Fridge using 2 kWh/day |
|---|---|---|---|
| 1,000 Wh | About 20 hours | About 14 hours | About 10 hours |
| 2,000 Wh | About 1.7 days | About 1.1 days | About 20 hours |
| 3,000 Wh | About 2.5 days | About 1.7 days | About 1.3 days |
Estimates assume 85% efficiency and normal use. Adding solar panels can stretch runtime a lot.
Our picks: the best portable power stations for a refrigerator and the best generators for home backup power.
How much does it cost to run a fridge?
Multiply daily kWh by your electricity rate. At 1.4 kWh a day and 17 cents per kWh, that’s about 24 cents a day, or roughly $85 a year. Check your utility bill for your actual rate.
An old fridge in a hot garage can cost far more. Here’s what to look for in a garage refrigerator.
Questions people ask
Does a fridge run all the time? No. The compressor cycles on and off, often running somewhere around a third to half of the time, more in a hot room or when the door is opened often.
Can a 1,000-watt generator run a fridge? Maybe, if its starting rating covers your fridge’s surge, but there’s little room for anything else. A 2,000-watt inverter is a safer minimum.
How long will food stay safe without power? The USDA says a closed fridge keeps food safe for about 4 hours. A full freezer holds about 48 hours, a half-full one about 24 hours, if the door stays closed.