WattCost

Data through June 2026

Running cost · Refrigerators · ENERGY STAR certified

Samsung RF28T5021

Running around the clock, the Samsung RF28T5021 uses a certified 645 kWh per year — about $118 at the U.S. average rate, or $9.86 a month, the equivalent of a steady 74-watt draw. It sits near the bottom of the certified table — using 15% more than the median bottom-freezer refrigerator (rank 1109 of 1478) — so the state you live in matters more than usual. The same unit costs $85 a year in Nevada but $340 in Hawaii — electricity rates, not the appliance, make the difference.

Uses 10% less energy than the U.S. federal minimum

Dimensions 70" H × 35.8" W

Estimated annual running cost · U.S. average rate 18.3¢/kWh

$118/yr

$7.70 · cheapest certified refrigerators$148 · priciest
Per month
$9.86
Per day
32¢
Certified use
645 kWh/yr
Configuration
Bottom Freezer
Total capacity
28.2 cu ft
Defrost
Automatic
Ice maker
Yes
Through-door dispenser
No
42 kWh805 kWh
Where the Samsung RF28T5021 (▮) sits among all 4,371 certified refrigerators, by annual kWh

What it costs in every state

Samsung RF28T5021: 645 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama16.4¢$106
Alaska28.2¢$182
Arizona15.2¢$98
Arkansas14.1¢$91
California34.7¢$224
Colorado17.1¢$110
Connecticut24.3¢$157
Delaware19.3¢$124
District of Columbia24.4¢$157
Florida15.1¢$97
Georgia16.4¢$106
Hawaiipriciest52.7¢$340
Idaho14.4¢$93
Illinois19.9¢$128
Indiana17.5¢$113
Iowa15.9¢$103
Kansas15.7¢$101
Kentucky14.3¢$92
Louisiana13.5¢$87
Maine29.6¢$191
Maryland21.8¢$141
Massachusetts29.6¢$191
Michigan23.0¢$148
Minnesota17.5¢$113
Mississippi14.9¢$96
Missouri16.2¢$105
Montana15.1¢$98
Nebraska13.3¢$85
Nevadacheapest13.1¢$85
New Hampshire27.0¢$174
New Jersey24.9¢$161
New Mexico15.1¢$97
New York29.5¢$190
North Carolina14.7¢$95
North Dakota14.1¢$91
Ohio19.2¢$124
Oklahoma14.3¢$92
Oregon16.3¢$105
Pennsylvania21.7¢$140
Rhode Island29.2¢$189
South Carolina15.6¢$100
South Dakota15.4¢$99
Tennessee14.1¢$91
Texas15.9¢$103
Utah13.4¢$86
Vermont24.4¢$158
Virginia17.2¢$111
Washington14.9¢$96
West Virginia15.4¢$100
Wisconsin19.6¢$126
Wyoming15.2¢$98

Certified models closest in efficiency

bottom-freezer refrigerators within reach of 645 kWh/yr
ModelkWh/yr$/yr (US avg)
KitchenAid KRFF336SPS645$118
KitchenAid KRQC736R645$118
KitchenAid KRQC836S645$118
Maytag MRFF4336TZ645$118
Samsung RF28T5001645$118
Samsung RF28T5A01645$118

Run your own numbers

Your rate, your numbers

Per day
32¢
Per month
$9.86
Per year
$118

645 kWh/yr × 18.3¢/kWh = $118/yr

Prefilled with this model's certified 645 kWh/yr — adjust if your usage differs from the DOE test basis. The certified annual kWh comes from the DOE test procedure, which measures continuous 24/7 operation at standardized temperatures — refrigerators never get a day off.

Questions, answered with the data

How much electricity does the Samsung RF28T5021 use?
ENERGY STAR certifies the Samsung RF28T5021 at 645 kWh per year. The certified annual kWh comes from the DOE test procedure, which measures continuous 24/7 operation at standardized temperatures — refrigerators never get a day off.
How much does the Samsung RF28T5021 cost to run per month?
About $9.86 a month at the U.S. average residential rate (18.3¢/kWh) — 32¢ a day, or $118 a year. Your state's rate moves this up or down; see the table above.
Is the Samsung RF28T5021 energy efficient?
It uses 15% more electricity than the median certified bottom-freezer refrigerator, which puts it among the least efficient certified models.
What does the Samsung RF28T5021 cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $85 a year in Nevada (13.1¢/kWh) and $340 in Hawaii (52.7¢/kWh).
How many watts does the Samsung RF28T5021 draw on average?
Spread over a year of continuous operation, 645 kWh works out to an average draw of about 74 watts — like leaving a 74-watt bulb on 24/7.

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