WattCost

Data through April 2026

Running cost · Refrigerators · ENERGY STAR certified

Samsung RF28T5021

Running around the clock, the Samsung RF28T5021 uses a certified 645 kWh per year — about $121 at the U.S. average rate, or $10.12 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 1098 of 1458) — so the state you live in matters more than usual. The same unit costs $80 a year in North Dakota but $301 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 18.8¢/kWh

$121/yr

$7.91 · cheapest certified refrigerators$152 · priciest
Per month
$10.12
Per day
33¢
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 4,229 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
Alabama17.4¢$112
Alaska27.4¢$176
Arizona15.5¢$100
Arkansas14.2¢$91
California35.3¢$227
Colorado16.5¢$107
Connecticut32.2¢$208
Delaware18.8¢$121
District of Columbia25.4¢$164
Florida15.4¢$99
Georgia15.4¢$99
Hawaiipriciest46.6¢$301
Idaho12.7¢$82
Illinois20.5¢$132
Indiana17.9¢$115
Iowa13.9¢$89
Kansas15.8¢$102
Kentucky15.0¢$97
Louisiana14.4¢$93
Maine28.4¢$183
Maryland22.1¢$142
Massachusetts29.4¢$190
Michigan21.4¢$138
Minnesota16.4¢$106
Mississippi16.8¢$108
Missouri14.0¢$90
Montana13.9¢$90
Nebraska13.3¢$86
Nevada14.3¢$92
New Hampshire27.2¢$176
New Jersey23.5¢$152
New Mexico15.2¢$98
New York29.4¢$190
North Carolina16.3¢$105
North Dakotacheapest12.3¢$80
Ohio19.5¢$126
Oklahoma13.3¢$86
Oregon15.8¢$102
Pennsylvania21.5¢$138
Rhode Island28.3¢$183
South Carolina17.1¢$110
South Dakota14.5¢$94
Tennessee14.9¢$96
Texas17.0¢$110
Utah13.3¢$86
Vermont24.6¢$158
Virginia17.4¢$112
Washington14.4¢$93
West Virginia16.1¢$104
Wisconsin19.2¢$124
Wyoming14.7¢$95

Certified models closest in efficiency

bottom-freezer refrigerators within reach of 645 kWh/yr
ModelkWh/yr$/yr (US avg)
KitchenAid KRFF336SPS645$121
KitchenAid KRQC736R645$121
KitchenAid KRQC836S645$121
Maytag MRFF4336TZ645$121
Samsung RF28T5001645$121
Samsung RF28T5A01645$121

Run your own numbers

Your rate, your numbers

Per day
33¢
Per month
$10.12
Per year
$121

645 kWh/yr × 18.8¢/kWh = $121/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 $10.12 a month at the U.S. average residential rate (18.8¢/kWh) — 33¢ a day, or $121 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 $80 a year in North Dakota (12.3¢/kWh) and $301 in Hawaii (46.6¢/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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