Refrigerator Running Cost Calculator
Estimate what a refrigerator really costs to run, using wattage ranges and usage patterns specific to this appliance — not a one-size-fits-all average.
A refrigerator is the opposite of an air conditioner when it comes to cost: its wattage is modest, but it never turns off. That 24/7 duty cycle is what makes it one of the biggest year-round energy users in most homes, even though the number on the nameplate looks small. The trick to estimating fridge cost is that it does not actually draw its rated wattage continuously — the compressor cycles on and off, typically running about a third of the time, so the effective daily energy is lower than "watts times 24" would suggest.
Age and type drive the real number. A modern ENERGY STAR fridge might use 350-400 kWh a year, while a 15-year-old model of the same size can use two to three times that. Side-by-side units with through-the-door ice and water dispensers use more than simple top-freezer models, and a second beer fridge or garage freezer running in a hot space can quietly add real money. The calculator below uses an effective duty cycle so the estimate reflects real cycling rather than a worst case.
Air Conditioner
Climate
Tip: Raising the thermostat by 1°C can cut cooling costs by up to 10%.
$18.63
109.6 kWh per month
Per day
$0.61
3.6 kWh
Per year
$223.38
1,314 kWh
Central and window AC units are among the largest home energy users, especially in summer.
Estimate based on typical usage.
Refrigerator power by type
Wattage isn't a single number. It ranges from about 90W to 300W depending on the type, so match the row closest to yours.
Modern top-freezer (ENERGY STAR)
~350-400 kWh/year; the most efficient common type.
Side-by-side with dispenser
Ice/water dispenser and larger volume raise usage.
French door (large)
Big capacity, more frequent compressor cycling.
Old fridge (10-15+ yrs)
Aging seals and compressor can double consumption.
Mini / dorm fridge
Low wattage but often poor insulation per liter.
Why a fridge costs more than its wattage looks
The compressor does not run constantly — it cycles to hold temperature, usually running roughly 30-40% of the time in a normal kitchen. That means a 150W fridge does not use 3.6 kWh a day; it uses closer to 1.2-1.5 kWh. The calculator applies an effective duty cycle so you are not overestimating by 3x.
Ambient temperature matters a lot. A fridge or freezer in a hot garage works much harder in summer and can use far more than the same unit in an air-conditioned kitchen. Door-opening frequency, how full it is, and worn door seals all push the compressor to run longer.
How to cut your refrigerator running cost
Retire a second old fridge
That decades-old garage or basement fridge kept "just for drinks" is often the single most wasteful appliance in the house. Unplugging it can save $100+ a year on its own.
Set sensible temperatures
Fridge at 37-40°F and freezer at 0°F is plenty. Colder settings waste energy without improving food safety.
Keep coils clean and seals tight
Dusty condenser coils and a door seal that no longer grips both force longer compressor runtime. Both are cheap to fix.
Give it breathing room
A fridge crammed against the wall or next to the oven cannot shed heat well. A few inches of clearance and distance from heat sources reduces runtime.
Frequently asked questions
A modern efficient fridge using about 400 kWh a year costs roughly $76 annually at $0.19/kWh. An old or oversized unit using 800-1,000 kWh could cost $150-190 a year. Enter your fridge’s wattage below for a personalized figure.
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