Compare Refrigerator Energy Use & Running Costs

This guide shows you how to compare the energy use of different refrigerators and estimate their annual running costs. You’ll learn to read the EnergyGuide label, convert annual kWh into dollars, and factor in your local electricity rate and usage habits—so you can choose a model that fits your budget and avoid sticker shock on your utility bill.

What You’ll Need

• The EnergyGuide label or spec sheet for each refrigerator (look for “Estimated Yearly Electricity Useâ€� in kWh)
• Your electricity rate in cents per kWh (found on your utility bill or your provider’s website)
• A calculator (or you can use the formula below)
• Optional: a watt-meter (like a Kill A Watt) if you want to measure an existing fridge’s actual draw

Step-by-Step

1. Locate the annual energy use. For new refrigerators, check the yellow EnergyGuide label—it states “Estimated Yearly Electricity Use� in kilowatt-hours (kWh). For used or unlabeled models, search the model number online or check the manufacturer’s spec sheet.
2. Find your electricity rate. Look at your latest utility bill. Find the line that shows the cost per kWh (usually between $0.08 and $0.30 in the US). If you have a tiered or time-of-use rate, use the average rate you pay per kWh.
3. Calculate annual running cost. Multiply the annual kWh by your rate (in dollars per kWh). For example: 600 kWh × $0.15/kWh = $90 per year.
4. Compare multiple models. Repeat the calculation for each candidate. Write down the annual cost for each—this lets you see the difference over a 10–15 year lifespan.
5. Adjust for your actual usage. The EnergyGuide number assumes typical household settings (about 70°F ambient, door openings, etc.). If your kitchen is warmer, the fridge runs more; if you keep it nearly empty, it may run less. A rough adjustment: add 5–10% for a hot garage or frequent door openings, subtract 5% if it’s in a cool basement.
6. Consider the purchase price vs. operating cost. A more efficient model may cost more upfront but save you $20–$50 per year. Divide the price difference by the annual savings to get the payback period in years.
7. If you own the fridge already, measure actual draw. Plug the fridge into a watt-meter for 24 hours. Multiply the kWh used in that day by 365 to get annual kWh, then multiply by your rate for a real-world cost estimate.

Common Mistakes

• Ignoring the difference between watts and kilowatt-hours. Watts measure power, kWh measures energy over time. A 500-watt fridge running half the time uses 500 × 0.5 × 24 = 6 kWh per day, not 500 kWh per day.
• Using the wrong electricity rate. Your bill may show a “deliveryâ€� charge and a “supplyâ€� charge separately—add them to get the true per-kWh cost. Also, some bills show a flat monthly fee; that’s not part of the per-kWh rate.
• Comparing different capacity classes. A 20 cu. ft. fridge will naturally use more than a 10 cu. ft. model. Compare only fridges of similar size and type (e.g., top-freezer vs. side-by-side).
• Forgetting that the EnergyGuide label is an estimate. Actual usage varies with room temperature, how often the door opens, and whether the fridge is fully stocked (full fridges hold cold better).
• Not factoring in the cost of the fridge over time. A cheap, inefficient model might cost more in electricity over 10 years than a pricier efficient one.

Tips

• Look for the ENERGY STAR label—it means the model is at least 10% more efficient than the federal minimum, but still compare the actual kWh numbers.
• Use your state’s average electricity rate (many utility websites list it) if you don’t have a bill handy.
• Consider the “cost per yearâ€� figure on the EnergyGuide label—it’s already calculated based on a national average rate, but you should recalculate with your own rate.
• If you’re comparing an older fridge, remember that models from before 2001 can use 50% more energy than current ones—replacing it may save $100+ per year.
• Keep the condenser coils clean and the door seals tight—these affect actual energy use more than the label.

Troubleshooting

• You can’t find the EnergyGuide label. Search the model number online (usually on a sticker inside the fridge). If that fails, use the average for that type: a typical top-freezer 18–20 cu. ft. uses about 500–600 kWh/year; a side-by-side uses 600–800 kWh/year.
• Your electricity bill doesn’t show a per-kWh rate. Look for “total costâ€� divided by “total kWh usedâ€� on the bill—that gives your average rate. Or call your utility and ask for the effective rate.
• The watt-meter shows a much higher number than the label. Your fridge may be old or have a failing compressor. Check the door seals and ensure the condenser coils are clean. If it’s still high, consider replacing it.
• Your actual bill doesn’t match your estimate. Remember that the fridge is only part of your usage. Also, your rate may have changed, or the fridge runs more in summer. Track it monthly to see trends.

Frequently Asked Questions

Q: How many kWh does a typical refrigerator use per year?
A: A modern 18–20 cu. ft. top-freezer model uses about 400–600 kWh/year. Side-by-side models use more, around 600–800 kWh/year. Compact models (under 10 cu. ft.) use about 200–400 kWh/year.

Q: Is it worth replacing an old fridge just for energy savings?
A: If your fridge is from 2000 or earlier, it may use 800–1,200 kWh/year. Replacing it with a new ENERGY STAR model (400 kWh/year) could save $50–$100 per year, depending on your electricity rate. A new fridge costs $500–$2,000, so the payback is 5–20 years—often not worth it unless the old one is also unreliable.

Q: Does a fuller fridge use less energy?
A: Yes, a full fridge retains cold better because the food acts as thermal mass. But don’t overstuff it—air circulation is needed. A mostly full fridge uses about 5–10% less energy than an empty one.

Q: Should I unplug my second fridge in the garage?
A: If it’s mostly empty, unplugging it can save $50–$150 per year. But if you use it for drinks or bulk storage, weigh the convenience against the cost. Also, garage temperatures can make a fridge run much harder in summer.

Q: How do I measure my fridge’s actual energy use?
A: Plug it into a watt-meter (like a Kill A Watt) for 24 hours. The meter will show kWh used. Multiply by 365 to get annual kWh, then multiply by your electricity rate. This is the most accurate method for an existing fridge.

Q: What does the “Estimated Yearly Operating Cost� on the EnergyGuide label mean?
A: That number is calculated using a national average electricity rate (about $0.13/kWh in the US). It’s a rough estimate—your actual cost will differ based on your local rate and usage patterns.

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