How Much Electricity Does a Refrigerator Use?

A refrigerator is the one appliance that never switches off, which makes people assume it dominates the bill. It usually does not. What it does have is a cost you can calculate precisely, because the annual figure is printed on a label rather than left to guesswork.

How much electricity does a refrigerator use?

The number that matters is annual kWh, and it comes from the yellow EnergyGuide label rather than from the nameplate. Divide it by 365 for a daily average or by 12 for a monthly one. A unit rated at 500 kWh a year averages about 1.4 kWh a day; one rated at 1,200 kWh averages about 3.3 kWh.

The spread between models is wide, and age is the biggest reason. ENERGY STAR reports that a refrigerator over 15 years old could be costing about $95 a year to run, and that an old unit uses about 20% more energy than one carrying the label. Those are published national statements, not measurements of your kitchen.

What does it cost to run a refrigerator?

• Daily electricity use = annual kWh ÷ 365.
• Monthly electricity use = annual kWh ÷ 12.
• Annual electricity cost = annual kWh × electricity rate in dollars per kWh.
• Measured annual use = average measured kWh per day × 365.

Use your effective rate rather than a headline one: relevant electricity charges divided by the kWh billed on a recent statement. The table below runs the same annual kWh figures across the range of rates American households pay.

A worked example

Why nameplate watts do not tell you the annual cost

A refrigerator's nameplate shows the current or wattage it can draw, not what it averages. The compressor runs in cycles, switching on to pull the temperature down and off again once it is reached, so it is idle for much of the hour. Fans, controls, interior lighting and the ice maker draw smaller amounts on their own schedules, and a defrost heater runs periodically at a much higher draw for a short period.

Multiplying rated watts by 24 hours therefore overstates consumption, often by a wide margin, because it assumes the compressor never stops. Watts are an instantaneous rate; kWh are energy consumed over time. Only the second one is billed.

What changes refrigerator electricity use most

Reading the EnergyGuide label

The yellow label the FTC requires on new appliances carries an estimated yearly electricity use in kWh, an estimated yearly operating cost, and a range showing where the model sits against comparable ones. Use the kWh figure and ignore the printed dollar amount: that cost is calculated from a national reference electricity rate rather than yours, and the reference figure is updated periodically. Recalculate it with your own rate, and only compare models of similar size and door configuration, since the comparison range is drawn against similar products rather than against every refrigerator sold.

Old versus new, and when replacement pays back

Two formulas settle it. Annual savings = (old annual kWh − new annual kWh) × electricity rate. Simple payback = extra replacement cost ÷ annual savings. If the annual saving is zero or negative, there is no energy payback at all and no arithmetic will produce one.

The trap is which cost goes into the numerator. Replacing a working refrigerator means the full purchase price, plus delivery and removal of the old unit, against a saving that is usually well under $100 a year — a payback measured in well over a decade. Replacing one that has already failed means only the premium for a more efficient model, which is a far smaller number and a far shorter payback. A larger new unit may also use more electricity than the smaller one it replaces, which reverses the saving entirely.

What ENERGY STAR actually saves

Certification requires 10% less measured energy use than the minimum federal standard for models of 7.75 cubic feet or more, under criteria last changed in August 2021, and models above 39 cubic feet are not eligible at all. ENERGY STAR separately describes certified refrigerators as about 9% more efficient than a model meeting the federal minimum, and puts the saving at about $150 over the product's 12-year lifetime when an old unit is recycled and replaced with a certified one.

Spread across twelve years, $150 is on the order of $12 a year. That is worth having when you are buying anyway, and it is not a reason on its own to replace a working appliance. The gain depends on what the new unit replaces, on your rate, and on how long you keep it — and ENERGY STAR does not publish the assumptions behind those figures.

The second refrigerator in the garage

An old unit demoted to the garage is often the most expensive refrigerator in the house per item stored. At 1,200 kWh a year it costs roughly $221 annually at the U.S. average rate, whether it holds a week of groceries or four drinks. ENERGY STAR's advice is direct: if you need a second refrigerator year-round, replace the old one rather than keep it running.

A garage also changes how the appliance behaves, and not always in the direction people expect. Heat makes the compressor run longer, which raises consumption. Cold is not automatically a saving either, because many models are not rated for low ambient temperatures and can stop cycling properly, which affects the freezer compartment. Check the manufacturer's stated ambient range before assuming a cold garage is free.

How to measure your refrigerator's real use

1. Read the EnergyGuide label first, or look up the model's rated annual kWh. That costs nothing and may be enough.
2. Fit a correctly rated plug-in energy meter. Household refrigerators generally run on a standard 120-volt outlet, which is what these meters are built for — check yours rather than assuming.
3. Leave it in place for several days. A few minutes tells you nothing, because you will catch either a compressor cycle or a gap between them.
4. Make sure the window is long enough to include at least one defrost cycle, which runs periodically and draws heavily while it does.
5. Divide the cumulative kWh by the number of days measured, then multiply by 365 for an annual figure.
6. Return the appliance to its normal configuration afterwards and confirm it is running and holding temperature.

What to do next

1. If the cost looks normal: leave it alone. Clearance behind the unit and a working door seal are the only free improvements worth making.
2. If you have a second refrigerator: price it with the table above before deciding whether it earns its place.
3. If your measurement is much higher than the label: check the seals, the setting, the clearance and the room temperature before concluding the appliance is failing.
4. If it runs constantly and still will not hold 40°F: treat it as a service call and a food-safety issue, not an energy question.
5. If you are replacing it anyway: compare EnergyGuide kWh between similar sizes, and run the payback on the price difference rather than the full price.