How to use this refrigerator energy cost calculator
The most reliable input is the refrigerator's annual energy use in kWh/year. You can often find this number on the yellow EnergyGuide label, product specification sheet, or manufacturer page. Enter that value with your electricity price per kWh to get daily, monthly, and yearly running cost.
If you do not know kWh/year, switch to watts mode. In that mode, enter the refrigerator's running power and an estimated compressor run time. This is useful for rough planning, but it is less precise because real refrigerators cycle on and off based on room temperature, door opening, food load, and condition.
If you are choosing a model before buying, pair this cost estimate with the Refrigerator Size Calculator so capacity, kitchen fit, and electricity cost are considered together.
Refrigerator electricity cost formula
yearly cost = annual kWh x electricity price per kWhmonthly cost = yearly cost / 12daily cost = yearly cost / 365watts mode annual kWh = running watts x duty cycle x 24 x 365 / 1000The EnergyGuide method uses the annual kWh value directly. Watts mode first estimates average power from running watts and duty cycle, then converts that estimate into annual kWh.
Assumptions and methodology
Refrigerators run year-round, but they do not draw full compressor power continuously. That is why this calculator treats annual kWh/year as the preferred input and uses watts mode only as an estimate when annual energy use is unknown.
- EnergyGuide kWh/year is usually better than rated watts for comparing refrigerator models.
- Watts mode assumes the refrigerator cycles on and off, using the compressor run time percentage you enter.
- Electricity price should come from your own bill when possible.
- Real cost can change with age, door seals, coil condition, ventilation clearance, room temperature, and how often the door is opened.
Example calculations
500 kWh/year refrigerator example
A refrigerator that uses 500 kWh/year at $0.18/kWh costs about $0.25 per day, $7.50 per month, or $90.00 per year.
In watts mode, 150 W running power with a 35% compressor run time estimates about 460 kWh/year. Use watts mode only when you do not have an EnergyGuide or measured annual kWh value.
Refrigerator electricity cost chart
This chart uses $0.18/kWh as an editable sample electricity price. Use the calculator above for your local rate.
| Annual energy | Monthly energy | Monthly cost | Yearly cost |
|---|---|---|---|
| 300 kWh/year | 25.0 kWh/month | $4.50 | $54.00 |
| 400 kWh/year | 33.3 kWh/month | $6.00 | $72.00 |
| 500 kWh/year | 41.7 kWh/month | $7.50 | $90.00 |
| 700 kWh/year | 58.3 kWh/month | $10.50 | $126 |
| 1000 kWh/year | 83.3 kWh/month | $15.00 | $180 |
EnergyGuide kWh/year vs refrigerator watts
For refrigerators, annual kWh is usually the cleanest comparison. The wattage printed on a label may be a rated value, a maximum value, or a value that does not represent real cycling behavior. A plug-in energy meter can be useful for an existing refrigerator, especially when checking an older unit.
If you only have watts, avoid assuming 24 hours at full rated power. Use watts mode with a duty-cycle estimate instead, and treat the result as a planning estimate.
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FAQ
How much does a refrigerator cost to run per month?
A refrigerator using 500 kWh/year at $0.18/kWh costs about $7.50 per month or $90.00 per year. Use your own kWh/year and electricity price for a better estimate.
Where do I find refrigerator kWh per year?
Look for annual energy use on the yellow EnergyGuide label, the product specification sheet, the manufacturer page, or a tested appliance database. For an existing refrigerator, a plug-in energy meter can provide a more specific measured value.
Why not multiply refrigerator watts by 24 hours?
A refrigerator is plugged in all day, but the compressor does not normally run at full power every minute. The EnergyGuide kWh/year value already accounts for tested cycling behavior, so it is usually a better input than rated watts alone.
Do older refrigerators cost more to run?
Often yes, especially if the seals, compressor, controls, or insulation have aged. The best way to check is to compare measured annual kWh or EnergyGuide values, then multiply the difference by your electricity price.
Does opening the refrigerator door change the cost?
Yes, but this calculator does not model every door opening. Frequent opening, warm room temperature, poor ventilation, dirty coils, and damaged door seals can increase compressor run time and real electricity use.
Is the default electricity price accurate for my home?
No. The default is only an editable example. Use the price per kWh from your own utility bill, especially if you have tiered pricing, time-of-use pricing, taxes, or local fees.