A refrigerator rated at 500 kWh per year costs about $84 per year, or $7 per average month, at an example electricity rate of 16.8¢/kWh. Your refrigerator electricity cost depends on its actual energy use and your utility tariff. The most useful starting point is usually annual kilowatt-hours on the EnergyGuide label, rather than the watts printed on an electrical rating plate.
This guide explains how to turn that annual figure into a cost estimate, avoid the “watts × 24 hours” mistake, and compare a label estimate with measured consumption. The tables are worked examples, not tests of particular refrigerator models.
1. Find your refrigerator’s annual kWh
Look for the yellow EnergyGuide label in the product listing, manufacturer documents or appliance paperwork. Find the estimated yearly electricity use expressed in kWh per year. Check the exact model number, including suffixes, before using a listing for comparison.
The Federal Trade Commission’s EnergyGuide explanation describes how the label helps compare appliances. Its printed yearly dollar estimate uses an assumed energy price; your cost can differ. Use annual kWh with your own rate instead of assuming the printed dollar figure is your future bill.
If the label is missing, the ENERGY STAR refrigerator page links to certified product listings. A listing for a similar-looking unit is not a substitute for your exact model. If you cannot find a reliable annual value, measure energy over several normal days with suitable equipment.
2. Why rated watts times 24 can overstate use
A refrigerator stays connected all day, but its electrical input changes as cooling, fans, defrost and other functions operate. Some compressors cycle on and off; variable-speed designs can change output. A brief running-watt reading is not necessarily a 24-hour average.
For example, assuming 150W continuously gives 150 × 24 ÷ 1,000 = 3.6 kWh per day, or 1,314 kWh per year. That calculation is valid only if 150W is the true average throughout the day. It should not be applied automatically to a refrigerator with a 150W operating reading.
A 500 kWh/year example instead averages about 1.37 kWh per day and 57.1W across the entire year. This mathematical average is not the compressor’s operating power and does not describe its startup demand.
3. Calculate refrigerator electricity cost
Annual cost = annual kWh × electricity price in dollars per kWh
Average monthly cost = annual cost ÷ 12
Average daily kWh = annual kWh ÷ 365
For 500 kWh/year at $0.168/kWh: 500 × $0.168 = $84 per year, and $84 ÷ 12 = $7 per average month.
We use 16.8¢/kWh as an illustrative rate, not a claim about the current U.S. average. Use the variable energy charges applicable to your usage. Fixed account fees, taxes, demand charges and changes between time-of-use periods are not included in this simple estimate.
| Annual use | Average daily use | Average monthly cost | Annual cost |
|---|---|---|---|
| 300 kWh | 0.82 kWh | $4.20 | $50.40 |
| 400 kWh | 1.10 kWh | $5.60 | $67.20 |
| 500 kWh | 1.37 kWh | $7.00 | $84.00 |
| 600 kWh | 1.64 kWh | $8.40 | $100.80 |
| 800 kWh | 2.19 kWh | $11.20 | $134.40 |
These rows are calculation inputs, not consumption ranges assigned to compact, French-door or other refrigerator types. Monthly figures are annual cost divided by 12; a specific month’s consumption can differ. Daily energy is rounded for display, while costs use the original annual figures.
4. See what a different utility rate changes
The same 500 kWh/year example costs $75 annually at 15¢/kWh, $100 at 20¢/kWh and $150 at 30¢/kWh. Equipment use has not changed in these examples; only the unit price has changed.
If your bill has tiered or time-of-use pricing, a single rate gives only an approximation. For dated state and national comparisons, consult the EIA electricity price table. Use your own utility’s current tariff for a household estimate.
5. Measure use before blaming the refrigerator
If the appliance and meter instructions permit it, use an appropriately rated plug-in energy meter and record accumulated kWh over several days of normal use. Keep the refrigerator operating normally and follow electrical and appliance instructions. Do not improvise adapters or use equipment that is unsuitable for the appliance.
Suppose the meter records 9.8 kWh over seven days. The measured average is 9.8 ÷ 7 = 1.4 kWh/day. At $0.168/kWh, that projects to $7.06 over 30 days and $85.85 over 365 days. These are projections from a short sample, not a forecast that accounts for seasonal room temperatures or changing habits.
Record the measurement dates, room conditions and unusual events such as loading groceries. That context helps explain differences from an annual label estimate. A higher reading alone does not diagnose a mechanical fault.
6. Reduce avoidable refrigerator energy use
- Check door gaskets and repair poor seals.
- Keep required ventilation clear and follow the manufacturer’s clearance instructions.
- Avoid placing the unit near strong heat sources where practical.
- Limit unnecessary door-open time.
- Follow the manual for temperature settings and safe maintenance; do not sacrifice food safety to save electricity.
These practices are consistent with ENERGY STAR’s refrigerator saving tips. When comparing replacements, compare capacity, features and annual kWh together. For example, a calculated reduction from 700 to 400 kWh/year saves 300 × $0.168 = $50.40 per year at our example rate. That does not by itself justify a purchase: price, expected life and other costs also matter.
Use our calculator with an average-watt input
To use the Appliance Electricity Cost Calculator with a 500 kWh/year label, convert the annual total to average watts: 500 × 1,000 ÷ (365 × 24) = about 57.08W. Enter that average with 24 hours and your electricity rate. Do not apply another duty-cycle reduction to this already averaged value.
The calculator’s monthly result uses 30 days, while the table above uses one-twelfth of a year. A small difference is expected. Related guides explain air conditioner duty-cycle assumptions and space heater running costs.
Published October 20, 2026. Method: arithmetic examples using stated assumptions; no hands-on product testing is claimed.