Chest Freezer Energy Cost Calculator
A typical 15 cu ft Energy Star chest freezer uses about 350 kWh a year — $4.67 a month or $56 a year at the 2024 US average of $0.16/kWh. A compact 5 cu ft chest costs about $34 a year, a large 22 cu ft one about $65. The calculator opens on a 150 W chest freezer — the 9 cu ft tier — plugged in 24 hours a day. Change the compressor wattage, how much of the day it runs, and your state below.
Freezer size
How much of the day it runs
Chest freezer cost per month
$3.85
24.1 kWh a month at $0.16/kWh — $46 a year (289 kWh).
Per day
$0.13
0.79 kWh a day
Per year
$46
289 kWh a year
Compressor hours
5.3 h
of the 24 hours it is plugged in
150 W ÷ 1,000 × 24 hours × 22% runtime = 0.79 kWh × $0.16 = $0.13 a day. Leave the runtime out — plate watts times 24 hours, the sum most people do — and you get $210 a year instead of $46. The compressor is off most of the time, which is why the smaller number is the real one.
Compressor wattage is the figure on the plate or in the manual — 100 W on a compact chest, 250 W on a 22 cu ft one. Runtime is the share of the day it spends switched on, which rises with room temperature, how empty the freezer is, and how often the lid comes up. If you have the yellow EnergyGuide sticker, its annual kWh already includes all of that: multiply it by your rate and skip the calculator. Not sure of your rate? Check average rates by state.
Want the cost for a different appliance or your exact utility rate? Use the appliance cost calculator, or compare a freezer against other always-on loads on the efficiency rankings.
The Formula
Yearly cost = annual kWh (from the EnergyGuide sticker) × price per kWh
Don't use nameplate watts for a freezer. The plate reports what the compressor draws while it is running, and the compressor does not run: once the contents are frozen it cycles on for about 18-25% of the day. The yellow EnergyGuide sticker's annual kWh already accounts for that, which is why it is the honest input. For an older unit without a sticker, use the size tier below.
Worked example (15 cu ft Energy Star chest, 350 kWh/year, $0.16/kWh): 350 kWh × $0.16 = $56 per year — $4.67 a month, or 0.96 kWh a day. Spread over every hour of the year that is an average draw of 40 W, not the 200 W on the plate.
Running Cost by Chest Freezer Size
Compressor draw is what the plate says; annual kWh is the Energy Star typical for that capacity. Read the two against each other and the runtime column falls out — a bigger freezer has a bigger compressor but better insulation per cubic foot, so it spends less of the day running, not more. Costs are at $0.16/kWh.
| Size | Compressor draw | Runs | kWh per year | Average draw | Cost per month | Cost per year |
|---|---|---|---|---|---|---|
| 5 cu ft (compact)Apartment or dorm overflow freezer | 100 W | 25% of the day | 215 | 25 W | $2.87 | $34 |
| 9 cu ft (mid)Small family supplementary freezer | 150 W | 22% of the day | 290 | 33 W | $3.87 | $46 |
| 15 cu ft (typical)The most common size — bulk shopping, hunters | 200 W | 20% of the day | 350 | 40 W | $4.67 | $56 |
| 22 cu ft (large)Big family, homestead, side of beef | 250 W | 18% of the day | 405 | 46 W | $5.40 | $65 |
| Pre-2010, 15 cu ftSame plate, far more runtime — often 1.5-2x a current model | 200 W | 34% of the day | 600 | 68 W | $8.00 | $96 |
The last row is the same 15 cu ft capacity with the same 200 W compressor as the row above it. Old freezers were not built with bigger motors — they were built with thinner insulation and less efficient compressors, so the extra electricity shows up as runtime: 34% of the day against 20%, and $40 a year.
Yearly Cost at Five Electricity Rates
The same four freezers, priced across the rates US households actually pay. The kilowatt-hours do not change down the column — the whole spread from $0.10 to $0.30 is your zip code. Find yours on the rates page.
| Rate ($/kWh) | 5 cu ft100 W · 215 kWh/yr | 9 cu ft150 W · 290 kWh/yr | 15 cu ft200 W · 350 kWh/yr | 22 cu ft250 W · 405 kWh/yr |
|---|---|---|---|---|
| $0.10 | $22 | $29 | $35 | $41 |
| $0.13 | $28 | $38 | $46 | $53 |
| $0.16 (US avg) | $34 | $46 | $56 | $65 |
| $0.20 | $43 | $58 | $70 | $81 |
| $0.30 | $65 | $87 | $105 | $122 |
A 15 cu ft chest at $0.30/kWh (Hawaii, parts of New England) costs $105 a year against $35 in a cheap-power state — the same freezer, nearly three times the bill. A pre-2010 unit costs $60 to $180 across the same range.
Summer vs. Winter: What the Room Temperature Costs You
A freezer holds 0°F inside no matter what the calendar says, so what changes through the year is the temperature difference its insulation has to fight. Heat leaks in proportional to that gap, and the EnergyGuide sticker was measured at 70°F. That gives a straightforward scaling: a 95°F garage in July is a 95-degree gap against a 70-degree one, so about 36% more electricity. Costs below are for the 15 cu ft chest at $0.16/kWh.
| Where and when | Ambient | vs. the sticker | Runs | Cost per month |
|---|---|---|---|---|
| Garage, winter (cold climate)Barely cycles — but check it is garage-ready | 40°F | −43% | 11% of the day | $2.67 |
| Basement, year roundStable and slightly below the rated ambient | 62°F | −11% | 18% of the day | $4.13 |
| Conditioned room, year roundWhat the EnergyGuide sticker assumes | 70°F | rated | 20% of the day | $4.67 |
| Garage, spring and fallClose to the sticker either side of summer | 78°F | +11% | 22% of the day | $5.20 |
| Garage, summer (hot climate)The expensive months, and the reason garages cost more | 95°F | +36% | 27% of the day | $6.33 |
This is a first-order model — conduction through the insulation, nothing else — and it errs low in summer, because a compressor also gets less efficient as its condenser heats up. It errs the other way in winter: opening the lid and freezing whatever you just put in cost the same in January as in July. Treat it as the shape of the swing, not a meter reading.
Hot-south garage (Phoenix, Houston, Florida)
5 summer months at 100°F, 4 shoulder months at 80°F, 3 winter months at 62°F.
Averaged over the year that is +20% against the sticker — $67 a year for the 15 cu ft chest instead of $56. Long summer, mild winter — the penalty never gets paid back.
Cold-north garage (Minneapolis, Buffalo)
3 summer months at 85°F, 4 shoulder months at 60°F, 5 winter months at 35°F.
Averaged over the year that is −20% against the sticker — $45 a year for the 15 cu ft chest instead of $56. Short summer, long cold winter — cheaper than the sticker on balance.
The catch in the cheap column. Below about 40°F ambient, a standard chest freezer's thermostat can stop calling for cooling altogether. That reads as free on the table above and is actually how food thaws: the compressor never runs, the box drifts up with the room, and a cold snap that ends warm can leave you with a chest full of spoiled meat. If your garage drops below freezing, buy a unit sold as "garage-ready" — it is built to keep cycling down there.
A basement beats a garage in both directions. It sits near 62°F all year, so it never pays the summer penalty and never risks the winter no-cycle problem. Moving a freezer out of a hot garage and into a basement is the single biggest one-time decision you make about what it costs to run — worth about $17 a year in a hot-south climate.
How a Chest Freezer Compares to the Other Cold Boxes
A chest freezer is the cheapest cold appliance in the house to run, which surprises people who assume freezing costs more than refrigerating. All three figures below use the same annual kWh tiers as the pages they link to, so none of these pages can quietly disagree with the others.
A refrigerator costs more than a freezer, not less
A typical 18-21 cu ft top-freezer fridge uses 550 kWh a year against 350 for a 15 cu ft chest — $88 a year against $56. The fridge is colder-for-less on paper but it has doors you open a dozen times a day, a defrost heater, a light, sometimes an ice maker, and far more door area for its volume. Full numbers on cost to run a refrigerator.
An upright freezer costs about 37% more for the same capacity
Same 15 cu ft, 480 kWh a year instead of 350 — $21 a year extra, because cold air falls out of a doorway and stays put in a box, and because most uprights are frost-free. If you are choosing between the two, cost to run a standalone freezer works the chest-versus-upright decision through by size.
Which to unplug if you are cutting the bill
An old second fridge in the garage is the expensive appliance in this comparison, not the freezer — and swapping one for a chest freezer of similar usable capacity is usually the biggest single saving available. Freezer vs. refrigerator cost puts every cold box on one table, including the pre-2010 garage fridge.
What Drives the Cost
Age matters more than size
A modern 22 cu ft chest uses 195 kWh a year less than a pre-2010 15 cu ft one, despite being half again the capacity. Compressor efficiency, insulation thickness, and refrigerant have all improved. If your freezer pre-dates 2010, replacing it saves about $40 a year at the US average rate regardless of size.
How full it stays
Frozen food is thermal mass that holds cold between compressor cycles. A 75-90% full chest cycles much less than a nearly-empty one. If you can't keep it loaded with food, jugs of water work just as well — fill them to ~90% to allow for expansion when they freeze.
Where it lives, and what month it is
The seasonal table above prices this out: the same freezer runs 27% of the day in a 95°F garage and 11% in a 40°F one. Averaged across a year, the same freezer in a hot-south garage costs about 50% more than it would in a cold-north one.
Door gasket condition
A worn or distorted lid gasket lets cold air leak 24/7. Test it by closing a dollar bill in the lid — if you can pull it out easily, the seal is leaking. Replacement gaskets are $10-$25, and a fresh seal often cuts a 5-year-old freezer's kWh by 5-10%.
How to Lower the Cost
Set it to 0°F, not -10°F
The FDA target for frozen food is 0°F. Every degree colder than that costs more. A $5 thermometer lets you dial it in correctly — often a 10-15% reduction with no food safety impact.
Keep it 75-90% full
Frozen food (or jugs of water) holds cold between compressor cycles. A packed chest runs noticeably less than an empty one.
Move it out of the hot garage
A basement sits near the rated 70°F all year, so it skips both the summer penalty and the winter no-cycle risk. Biggest one-time win available.
Check the lid gasket yearly
Dollar bill test: close one in the lid and tug — if it slides out, replace the gasket. $10-$25 part, 5-10% kWh saving.
Defrost it once a year
Chest freezers are manual-defrost. A 1/4" layer of frost on the walls insulates the cold from the contents, making the compressor run longer. Annual defrost keeps efficiency on spec.
Replace pre-2010 units
An old 15 cu ft chest runs 600 kWh a year against 350 for a current model — $40 a year. Check your utility for recycling rebates ($30-$75 typical).
Recommended picks
Cheap Ways to Cut Chest Freezer Costs
Because a freezer runs 24/7, small efficiency wins compound across the whole year. These picks cover the highest-ROI fixes — most cost less than $25.
Energy Star Chest Freezer
10%+ less electricity
Energy Star chest freezers use at least 10% less than the federal standard, and 20-30% less than a pre-2010 unit — typically $15-$35/year saved.
Freezer Thermometer
Avoid over-cooling
Most chest freezers ship set colder than they need to be. A $5 thermometer lets you dial in 0°F (the FDA target) instead of -10°F, cutting runtime by 10-15%.
Freezer Door Gasket / Seal Kit
$10 maintenance fix
A worn lid gasket bleeds cold air 24/7. Replacing the seal on a 5-year-old chest freezer often cuts kWh by 5-10% — a cheap fix that pays back fast.
Smart Plug Energy Monitor
Measure actual draw
Plug-in meter shows real daily kWh — useful for verifying garage-placement penalty, gasket repairs, or comparing an old freezer's actual draw to a new one.
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Related Guides
Freezer vs. Refrigerator Cost
Chest, upright, and fridge compared by annual kWh and cost
Cost to Run a Refrigerator
Annual kWh and cost by fridge type, age, and rate
Cost to Run a Standalone Freezer
Chest vs. upright by size, wattage, and electricity rate
Refrigerator Cost Per Month (By Model Size)
Monthly cost broken down by mini, top-freezer, French door, side-by-side
Old vs. New Appliances
Break-even math for an Energy Star upgrade
Most Efficient Appliances
See which appliances cost the most to run
Electricity Rates by State
Find your state's average rate
How to Save on Energy Bills
Practical tips by room with savings
Energy Star Guide
Is upgrading worth the cost?
Frequently Asked Questions
How much does it cost to run a chest freezer?
A modern 15 cu ft Energy Star chest freezer uses about 350 kWh a year, which at the 2024 US average rate of $0.16/kWh is $4.67 a month or $56 a year. A compact 5 cu ft chest costs about $34 a year and a large 22 cu ft one about $65. Those are small numbers because the compressor spends most of the day switched off: it draws 200 W while running, but only runs about 20% of a 24-hour day once the contents are frozen.
How much of the day does a chest freezer compressor actually run?
Between about 18% and 25% of the day for a modern well-loaded chest in a 70°F room — that is what the EnergyGuide annual kWh works out to against the compressor's rated draw. It rises from there: a half-empty freezer, a warm garage, or a lid that comes up ten times a day all push runtime up, and a pre-2010 chest with thinner insulation and an older compressor runs nearer 34%. It also depends on how big the compressor is: the same 350 kWh a year is 33% of the day on a 120 W compressor and 20% on a 200 W one — a smaller motor simply runs longer for the same electricity. What never works is the plate itself: multiply 200 W by 24 hours and you get $280 a year instead of $56.
Does a chest freezer cost more to run in summer?
Yes, and in a garage the difference is large. Heat leaks into the box through its insulation in proportion to the temperature difference across it, and the inside is held at 0°F whatever the season. A garage at 95°F in summer is a 95-degree gap against the 70-degree gap the sticker was measured at, so roughly 36% more electricity — about $6.33 a month for a 15 cu ft chest. The same freezer in the same garage at 40°F in January costs about $2.67 a month: the summer bill is roughly 2.4 times the winter one. Inside a heated house the swing mostly disappears, because the room barely changes.
Why is a chest freezer cheaper to run than an upright freezer?
Cold air falls. When you open a chest freezer, the cold stays in the box and only the warmer top air spills out. Open an upright and you dump out the cold air in one go, just like a fridge. Most chests are also manual-defrost, so there is no defrost heater periodically adding heat the compressor then has to remove. At 15 cu ft the site's figures are 350 kWh a year for a chest against 480 for an upright — the upright uses about 37% more, or put the other way, the chest costs about 27% less to run, $21 a year at the US average rate. The trade-off is access: finding what is at the bottom of a chest is much harder than reaching a labeled shelf.
Is it worth replacing an old chest freezer?
If it is pre-2010, usually. This site's figures put a 1990s 15 cu ft chest at 600 kWh a year against 350 for a current Energy Star model of the same size — $40 a year at the US average rate, and more like $75 where electricity costs $0.30/kWh. Over a 15-year freezer lifespan that is often more than the replacement costs. Many utilities also offer $30-$75 recycling rebates for hauling the old one away.
How full should I keep a chest freezer?
Aim for 75-90% full. Frozen food acts as thermal mass — once cold, it holds temperature much better than empty air, so the compressor cycles less. A nearly empty chest cycles constantly to re-cool warm air, while a packed one barely runs. If you don't have enough food to fill it, jugs of water (filled to ~90% to allow for expansion) work just as well and are free.