Refrigerator & Freezer Cost to Run: Measure It, Set the Right Temps, and Know When Replacement Pays

Your refrigerator is one of the few appliances in the house that never turns off. It runs every hour of every day, in summer and winter, and a second fridge or chest freezer in the garage doubles that. The good news: refrigerators are also one of the easiest loads to measure with a cheap plug-in meter, and the most common money leaks — a thermostat set colder than it needs to be, a door that doesn’t seal, an old second fridge humming away in a hot garage — are cheap or free to fix.

Measure what your fridge and freezer use, turn that into dollars at your rate, and fix the free settings. Then decide whether a thermometer, coil brush, new gasket or new fridge is worth paying for.

The 60-second version

• Cost = kWh per year × your $/kWh. Get the kWh from a 24–48 hour plug-in meter reading, not a guess.
• Set temperatures by thermometer, not by dial. The FDA target is 40°F or below in the fridge and 0°F in the freezer; ENERGY STAR suggests 35–38°F for the fridge. Colder than that just costs money.
• Test the door seal with a dollar bill. If it slides out easily, clean, adjust, or replace the gasket.
• Coil cleaning is maintenance, not magic. It helps clogged units; field studies found small or no savings on average.
• The biggest lever is usually the second fridge. Old, half-empty, in a hot or freezing garage — measure it, and if you can live without it, retire it.
• Replacing a working kitchen fridge rarely pays back on energy alone. Replacing a very old one that’s failing anyway is a different calculation.

Step 1: Measure the fridge first (it’s a 120 V plug — easy)

A plug-in energy meter like the Kill A Watt is the right tool here. Fridges and freezers cycle: the compressor runs, stops, runs again, and many models add a defrost heater cycle every so often. A 10-second wattage reading tells you almost nothing. You want accumulated kWh over a long window.

1. Plug the meter into the wall, and the fridge into the meter. Pulling a fridge out is a two-person job on many models; protect the floor and don’t kink the water line if it has one. If the outlet is buried behind cabinets, see the “can’t reach the plug” row in the troubleshooting table.
2. Leave it for 24–48 hours of normal use. Include normal door openings, a grocery run, and the ice maker if you use it. Longer is better.
3. Read total kWh and elapsed hours. Then:

kWh per year ≈ (kWh measured ÷ hours measured) × 8,760
Yearly cost ≈ kWh per year × your $/kWh

Worked example: 2.6 kWh over 48 hours = 0.054 kWh per hour × 8,760 ≈ 475 kWh a year. At $0.18/kWh, that’s about $85 a year — roughly $7 a month.

Use your bill’s all-in rate (total electric charges ÷ total kWh). The U.S. average residential price was 18.31¢/kWh in July 2026 (EIA, preliminary); yours may be far higher or lower.

Compare to the yellow EnergyGuide label

New refrigerators and freezers carry an FTC EnergyGuide label with an estimated kWh per year. If you still have it, or can find your model number’s label or spec sheet online, compare:

• Measured close to the label? The fridge is behaving normally. Your savings will come from settings and habits, not repairs.
• Measured well above the label? Look for a bad gasket, a too-cold setting, a clogged condenser, a hot location, a broken door switch that leaves the light on, or a failing compressor.

Two caveats keep this honest. The label’s dollar figure uses a national average electricity price, not yours — the FTC says your cost depends on your utility rate and use. And field use doesn’t always match the test lab: Lawrence Berkeley Laboratory’s New York monitoring project found labels overpredicted real-world use of new fridges by about 13%, and a fridge in a hot kitchen or garage can easily run above its label. Treat a big gap — say 50% or more over the label — as a signal, and a small gap as noise.

What it costs per year (do this math once)

Example rates only — swap in yours.

For context, ENERGY STAR estimates a certified chest freezer at about 215 kWh a year and a certified upright freezer at about 395 kWh. If your old garage freezer measures 1,000 kWh or more, it’s in a different league.

Step 2: Set the temperatures right (free, and food-safe)

Most refrigerator dials are numbers or “colder/warmer,” not degrees — and even digital displays can be off. The FDA puts it plainly: few refrigerator controls show actual temperatures, so use a freestanding appliance thermometer, one for the fridge and one for the freezer.

Targets:

• Refrigerator: 40°F or below (FDA and USDA). ENERGY STAR and DOE suggest 35–38°F. Aiming for about 37°F gives you a safety margin without overcooling.
• Freezer: 0°F (FDA, USDA, ENERGY STAR).

How to check (USDA’s method):

1. Put a fridge thermometer in a glass of water in the middle of the refrigerator. Wait 5 to 8 hours. If it isn’t 38–40°F, adjust the control and check again after another 5–8 hours.
2. Put a freezer thermometer between frozen packages. Wait 5–8 hours. If it isn’t 0–2°F, adjust and recheck.

The glass of water smooths out the air-temperature swings you see every time the door opens or the compressor cycles. Make one change at a time; most refrigerators need hours to settle.

Where the money is: a fridge running at 33°F or a freezer at −10°F does more work than it needs to. How much more depends on the model, so we won’t quote a number — but setting back to target is free, and your next 48-hour meter reading will show you the difference.

Do not go warmer than 40°F in the fridge to save money. That’s the food-safety line. Bacteria grow fastest above it.

A wireless thermometer with alerts is cheap insurance

For a garage fridge, basement freezer, or anything full of expensive food, a wireless thermometer with an alarm pays for itself the first time it catches a door left ajar or a tripped breaker. It also shows you the min/max swing, which is the fastest way to see whether a unit is struggling. Products are below.

Step 3: Test and fix the door seal (the dollar-bill test)

The U.S. Department of Energy’s test is simple: close the door on a piece of paper or a dollar bill so it’s half in and half out. If you can pull it out easily, the latch may need adjusting, the seal may need replacing, or it may be time to consider a new unit. Do it in several spots around the door — top, bottom, both sides, and corners.

If the bill slides out:

1. Clean the gasket. Sticky spills and crumbs stop it seating. Warm soapy water and a soft cloth; dry it.
2. Check the door alignment and leveling. Many refrigerators are designed to tilt slightly back so doors swing shut on their own. Your manual shows how to adjust the front leveling legs or rollers.
3. Look for tears, flattening, or a gasket that’s pulled out of its channel. Older gaskets can harden and stop sealing.
4. Replace it if it’s damaged. Gaskets are model-specific. Order by your exact model number (on the label inside the fresh-food compartment) from the manufacturer or a reputable appliance-parts supplier. On many models it’s held by screws or pressed into a channel under the liner lip; follow the model’s instructions. “Universal” cut-to-fit gaskets exist, but a model-matched part is the safer bet.

ENERGY STAR’s advice is the same in fewer words: make sure the seals around the doors are airtight, and if they aren’t, replace them.

Step 4: Clean the condenser coils (honest version)

The condenser coils release the heat your fridge pulls out of the food compartment. When they’re blanketed in dust and pet hair, the refrigerator has to work harder to shed that heat. ENERGY STAR and DOE both suggest keeping the coils clean on older models and leaving a few inches of space between the fridge and the wall.

What the measured evidence says:

• Lawrence Berkeley Laboratory’s New York refrigerator monitoring project found no measurable savings from maintenance for the group as a whole. But of five units with plugged condensers — all with coils mounted on the bottom — two used markedly less energy after cleaning.
• A Florida field study for DOE’s Building America program measured roughly 3.5% weather-adjusted savings from coil cleaning that appeared to disappear in a longer-term analysis.

So: clean coils that are visibly clogged, especially bottom-mounted ones in homes with pets. It’s cheap, it may help a struggling unit and its compressor, and it takes 20 minutes. Just don’t expect it to show up as a big line on your bill. Many newer refrigerators have coils that are hard to reach or not exposed at all; if your manual doesn’t describe cleaning them, don’t force it.

How to do it safely:

1. Unplug the refrigerator first. (Food is fine for the few minutes this takes if you keep the doors closed.)
2. Find the coils: behind the bottom front grille (the toe kick) on many models, or on the back on older ones. Check the manual.
3. Remove the grille if needed. Use a long, narrow coil brush to loosen dust, and a vacuum crevice tool to pull it out. Work gently — don’t bend fins or tubing, and keep away from the fan blade.
4. Reinstall the grille, plug the fridge back in, and push it back with a few inches of clearance.
5. If you’re curious whether it mattered, run another 48-hour meter reading and compare.

How often? Many manufacturers suggest once or twice a year; more if you have shedding pets. Your manual wins.

Step 5: Free habits that actually matter

• Keep the doors closed and decide what you want before you open them. Teach kids the “stare into the fridge” rule.
• Cool leftovers fast, safely. The FDA advises dividing large amounts into shallow containers for quicker cooling and refrigerating within 2 hours (1 hour above 90°F outside). Don’t leave food out longer to “save energy.”
• Cover liquids and foods. DOE notes uncovered foods release moisture and make the compressor work harder.
• Keep it away from heat. Not next to the oven, dishwasher, or a sunny window if you have the choice.
• Leave airflow room behind and above it, and don’t block the bottom front grille.
• Don’t block the internal vents. Many fridges move cold air from the freezer to the fresh-food section through vents. Jamming them with food causes warm spots and longer run times.
• Defrost manual-defrost freezers before frost reaches a quarter inch (ENERGY STAR, DOE).
• Check the “energy saver” or anti-sweat switch if your model has one. It controls small heaters that keep the door edges from sweating. Some manuals say to leave it on in humid weather to prevent condensation — follow yours.
• Consider the ice maker. DOE notes models without an ice maker or dispenser use less energy. If you never use the ice maker, many models let you turn it off.

Garage fridges and second freezers: the honest math

This is where the real money usually hides. DOE’s kitchen appliance guide says it bluntly: “Just say no to a second fridge.” A second refrigerator in the basement or garage is often older and can cost more than $100 a year to run.

Garage temperature matters in both directions

• Hot garages make the compressor run longer to dump heat into already-hot air.
• Cold garages can be worse for food. On many refrigerators the thermostat sits in the fresh-food side; when the garage is cold, the compressor barely runs, and the freezer can warm up even though the fridge feels fine. GE says it does not recommend installing non-garage-ready refrigerators where temperatures go below 60°F, and that operating at extremes can harm the compressor or sealed system (oil can thicken below 32°F and break down above 110°F). GE’s garage-ready top-freezer models are rated for 38°F to 110°F.
• ENERGY STAR’s freezer advice: unless you live in a mild climate, keep your freezer indoors, such as in a basement. Extreme temperatures are hard on the compressor.

If your garage freezes in winter or bakes in summer, check your manual’s ambient temperature range before you assume the fridge out there is safe for food. A wireless thermometer will show you what’s actually happening in the freezer section.

Do you need it at all?

Run the meter on the second unit for 48 hours. Then ask:

Many utilities and appliance retailers offer pickup and recycling for old refrigerators and freezers — DOE and ENERGY STAR both point to recycling rebates. Check your utility’s site before you pay anyone to haul it away. Old refrigerators contain refrigerant and must be handled properly; don’t dump one. Before any old fridge or freezer leaves your possession, take the doors off or secure them — children have been trapped in discarded refrigerators.

Chest vs upright freezer

ENERGY STAR also notes manual-defrost freezers use about half the energy of automatic-defrost models — but only if you actually defrost them before frost passes a quarter inch. If you know you won’t, the frost-free model may be the more realistic choice. Either way, buy the smallest size you’ll keep reasonably full; ENERGY STAR says larger units generally use more energy.

When replacement pays back (and when it doesn’t)

ENERGY STAR says certified refrigerators are about 9% more efficient than the federal minimum, that refrigerators over 15 years old could be costing you about $95 more per year to run, and that replacing and recycling an old fridge with a certified model saves about $150 over the new fridge’s 12-year lifetime. DOE’s kitchen guide puts an old refrigerator at up to 33% more than the newest ENERGY STAR models. LBL’s 1993 New York study measured 60% savings when old in-home refrigerators were replaced with then-new models. The point: the older and worse your measured number, the bigger the payoff. A recent fridge leaves little to gain.

Do the math with your measured kWh:

Yearly saving = (measured kWh/yr − new model's EnergyGuide kWh/yr) × your $/kWh
Simple payback (years) = price of new fridge ÷ yearly saving

Illustrative numbers. Remember labels can under- or overpredict real use; your measured number for the new unit may differ.

When replacement makes sense, ENERGY STAR and DOE point the same way: the most efficient full-size models are typically 16–20 cubic feet, top-freezer models tend to use the least energy, and models without an ice maker or dispenser use less. Check for utility rebates and pickup programs before you buy.

What not to do

• Don’t unplug a refrigerator or freezer with food in it to “save energy,” and don’t put food storage on a smart-plug schedule. Measure yes, cut power no. See our smart plugs guide for loads that do belong on a schedule.
• Don’t set the fridge warmer than 40°F or the freezer above 0°F to trim the bill.
• Don’t use an extension cord or adapter plug unless your manual specifically allows it. GE and Whirlpool manuals generally say to plug directly into a properly grounded three-prong outlet and never remove the ground prong.
• Don’t block vents, inside (cold-air vents between compartments) or outside (the bottom front grille and rear clearance).
• Don’t clean coils with the fridge plugged in, and don’t bend coils, fins, or tubing.
• Don’t chip frost with a knife or screwdriver. You can puncture the refrigerant tubing. Unplug and let it melt, as the manual describes.
• Don’t run a wired thermometer’s cable through the door gasket in a way that keeps the door from sealing; it can cause frost and the very leak you’re trying to fix. Thin flat probe wires are designed for this — make sure the door still closes fully.
• Don’t park a non-garage-ready fridge in a garage that drops below your manual’s minimum ambient temperature.
• Don’t send an old fridge or freezer to the curb with the doors on, or dump it — recycle it properly.

Our picks

We earn a commission if you buy through these Amazon links, at no extra cost to you. Check size and fit on the listing before you order.

What we left out

• Door gaskets. They’re model-specific. Order by your model number from the manufacturer or a reputable parts supplier, not from a generic search result.
• “Fridge energy saver” plug-in gadgets that claim to cut a compressor’s power use. If one actually worked, your meter would show it; we haven’t seen evidence that they do.
• Smart plugs for fridges and freezers. Food safety beats a few cents of standby.
• New refrigerators. Too model-, size-, and kitchen-specific for a shortlist. Use ENERGY STAR’s product finder and the EnergyGuide label, and check utility rebates first.

Troubleshooting

What this won’t fix

• A fridge is usually a modest slice of the bill. Heating, cooling, and water heating typically dwarf it. A second fridge, an old freezer, or a broken unit is where the noticeable money lives.
• Settings and habits save a little, steadily. Expect a few dollars a year from a temperature fix, not a transformed bill.
• Coil cleaning evidence is weak on average. It’s worthwhile maintenance on clogged units; it’s not a reliable savings strategy.
• Labels and field use differ. Measure before and after any change, with the same 24–48 hour window.
• We don’t publish a “you’ll save X%” number because the result depends on your model, its age, your rate, your kitchen or garage temperature, and your habits.

Checklist: one weekend

1. Note your all-in $/kWh from the bill.
2. Put a plug-in meter on the main fridge for 48 hours; do the kWh × rate math.
3. Move the meter to the second fridge or freezer for 48 hours.
4. Put thermometers in the fridge (in a glass of water) and freezer; adjust toward ~37°F and 0°F.
5. Do the dollar-bill test around every door; clean or adjust the gasket.
6. Unplug, clean visibly clogged coils, leave a few inches of clearance.
7. Decide on the second unit: retire it, use it seasonally, or keep it with an alarm thermometer.
8. Replace only if your measured kWh minus the new label’s kWh pays back in a time frame you’d accept — or the old unit is failing anyway.

FAQ

How much does it cost to run a refrigerator per year?

Multiply the refrigerator’s yearly kWh by your all-in electric rate. A unit using 450 kWh a year costs about $81 at $0.18 per kWh; an older or garage unit using 1,000 kWh costs about $180. The yellow EnergyGuide label lists an estimated kWh per year, but its dollar figure uses a national average price, so redo the math with your own rate — or measure the real number with a plug-in energy meter for 24 to 48 hours.

What temperature should my refrigerator and freezer be set to?

The FDA says to keep the refrigerator at 40°F or below and the freezer at 0°F. ENERGY STAR recommends 35 to 38°F for the fresh-food side. Few dials show real temperatures, so put an appliance thermometer in a glass of water in the middle of the fridge and another between frozen packages, wait 5 to 8 hours as USDA advises, and adjust. Running colder than needed costs money without making food safer.

Does cleaning refrigerator coils save energy?

Sometimes, but usually less than people claim. In a Lawrence Berkeley Laboratory field study of New York refrigerators, maintenance produced no measurable savings across the group, though two of five units with plugged bottom-mounted condensers used markedly less energy after cleaning. A Florida field study for the U.S. Department of Energy found roughly 3.5% weather-adjusted savings that faded in a longer analysis. Clean visibly clogged coils as cheap maintenance, not as a big bill fix.

Is it worth keeping a second refrigerator in the garage?

Measure it first. The U.S. Department of Energy says a second fridge in a basement or garage is often older and can cost more than $100 a year to run. Garages also push fridges outside their design range: GE says it doesn’t recommend non-garage-ready refrigerators where temperatures go below 60°F, and its garage-ready models are rated 38°F to 110°F. If the second unit is half empty, unplugging it, emptying it, and recycling it usually beats any upgrade.

When does replacing an old refrigerator pay for itself?

Only when the measured gap is big. Subtract the new model’s EnergyGuide kWh from your measured kWh, multiply by your rate, and divide the price of the new fridge by that yearly saving. A working kitchen fridge that already uses 500 kWh a year usually won’t pay back on energy alone. A 15-plus-year-old unit using 1,000 kWh or more, or a fridge that’s failing anyway, is a different story — and a second fridge you can live without pays back fastest when you simply retire it.

Is a chest freezer cheaper to run than an upright?

Usually. ENERGY STAR estimates a certified chest freezer at about 215 kWh and $30 a year versus about 395 kWh and $60 for a certified upright, because a top-opening lid lets less cold air spill out. ENERGY STAR also says manual-defrost freezers use about half the energy of automatic-defrost models, as long as you defrost before frost reaches a quarter inch. Uprights are easier to organize, so pick the one you’ll actually keep full and closed.

Sources

• U.S. FDA, Refrigerator Thermometers: Cold Facts about Food Safety — fridge 40°F or below, freezer 0°F; few controls show actual temperature; use one thermometer in each; shallow containers and the 2-hour rule
• USDA Food Safety and Inspection Service, Appliance Thermometers — glass-of-water method, 5–8 hour wait, 38–40°F and 0–2°F targets
• ENERGY STAR, Refrigerators — ~9% better than federal minimum; 35–38°F; over-15-year-old fridges ~$95/yr more; ~$150 lifetime savings from replace-and-recycle; coil cleaning on older models; door seals; 16–20 cu ft and top-freezer efficiency
• ENERGY STAR, Freezers — chest 215 kWh/$30 vs upright 395 kWh/$60; manual defrost uses about half the energy; quarter-inch frost rule; keep freezers indoors unless climate is mild
• U.S. DOE, Energy Saver guide (PDF) — dollar-bill door seal test; 35–38°F and 0°F; ice makers and dispensers use more; cover foods; recycle old second fridges
• U.S. DOE, Consumer Guide to Kitchen Appliances (PDF) — second fridges often cost more than $100/yr; old fridges up to 33% more than new ENERGY STAR models; chest vs upright
• U.S. FTC, How To Use the EnergyGuide Label — estimated cost uses a national average price; your cost depends on your rates and use
• Meier, Megowan, Litt & Pon, The New York Refrigerator Monitoring Project, Lawrence Berkeley Laboratory LBL-33708 (1993), summarized with excerpts at Appropedia: Should I clean my refrigerator coils — labels overpredicted field use by 13%; replacement saved 60%; no measurable group savings from maintenance; 2 of 5 plugged condensers improved markedly
• NREL / Building America, Phased Retrofits in Existing Homes in Florida Phase I (PDF, 2016) — coil cleaning ~3.5% weather-adjusted savings that faded in long-term analysis
• GE Appliances, Refrigerator installation location and temperature and Garage Ready top-freezer refrigerators — non-garage-ready units not recommended below 60°F; garage-ready rated 38–110°F; compressor oil risks at extremes
• U.S. Energy Information Administration, Electric Power Monthly, Table 5.3 — average U.S. residential price 18.31¢/kWh, July 2026 (preliminary)

Related reading

• Kill A Watt & plug-in energy meters — the 48-hour fridge measurement, step by step
• Dehumidifier cost to run & basement humidity — another always-on compressor load to meter in damp basements
• Best smart plugs for vampire power — which loads belong on a schedule (not this one)
• Emporia Vue vs Sense — whole-home and circuit-level monitoring when the plug is out of reach
• Air fryer & toaster oven vs full oven — the cooking side of kitchen energy
• Dryer vent cleaning kits — the other appliance where lint and dust cost money
• Garage door weather seals — if the garage fridge stays, a tighter garage helps it
• Lower your electric bill: priority checklist — this-month order of operations
• Start Here — full suggested reading order

Bottom line

Measure before you spend: 48 hours on a plug-in meter turns a refrigerator or freezer into a dollar figure you can act on. Then do the free things — thermometer-checked temperatures at about 37°F and 0°F, a dollar-bill door test, a clear vent path, and coils cleaned when they’re actually clogged. The biggest win is usually the second fridge or old freezer: retire it if you can, protect it with an alarm thermometer if you can’t, and replace a working kitchen fridge only when your measured kWh says it will pay back.

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