WattCost

Data through April 2026

Running cost · Refrigerators · ENERGY STAR certified

Samsung RT21M62*5

Running around the clock, the Samsung RT21M62*5 uses a certified 478 kWh per year — about $90 at the U.S. average rate, or $7.50 a month, the equivalent of a steady 55-watt draw. It sits near the bottom of the certified table — using 32% more than the median top-freezer refrigerator (rank 658 of 674) — so the state you live in matters more than usual. Where you live moves the bill from $59 a year in North Dakota to $223 in Hawaii. It also meets ENERGY STAR's stricter “Most Efficient” criteria.

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

Dimensions 67.8" H × 32.9" W

Estimated annual running cost · U.S. average rate 18.8¢/kWh

$90/yr

$7.91 · cheapest certified refrigerators$152 · priciest
Per month
$7.50
Per day
25¢
Certified use
478 kWh/yr
Configuration
Top Freezer
Total capacity
21.1 cu ft
Defrost
Automatic
Ice maker
Yes
Through-door dispenser
No
42 kWh805 kWh
Where the Samsung RT21M62*5 (▮) sits among all 4,229 certified refrigerators, by annual kWh

What it costs in every state

Samsung RT21M62*5: 478 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama17.4¢$83
Alaska27.4¢$131
Arizona15.5¢$74
Arkansas14.2¢$68
California35.3¢$168
Colorado16.5¢$79
Connecticut32.2¢$154
Delaware18.8¢$90
District of Columbia25.4¢$121
Florida15.4¢$74
Georgia15.4¢$73
Hawaiipriciest46.6¢$223
Idaho12.7¢$61
Illinois20.5¢$98
Indiana17.9¢$86
Iowa13.9¢$66
Kansas15.8¢$75
Kentucky15.0¢$72
Louisiana14.4¢$69
Maine28.4¢$136
Maryland22.1¢$105
Massachusetts29.4¢$141
Michigan21.4¢$102
Minnesota16.4¢$78
Mississippi16.8¢$80
Missouri14.0¢$67
Montana13.9¢$66
Nebraska13.3¢$63
Nevada14.3¢$68
New Hampshire27.2¢$130
New Jersey23.5¢$112
New Mexico15.2¢$72
New York29.4¢$141
North Carolina16.3¢$78
North Dakotacheapest12.3¢$59
Ohio19.5¢$93
Oklahoma13.3¢$64
Oregon15.8¢$75
Pennsylvania21.5¢$103
Rhode Island28.3¢$135
South Carolina17.1¢$82
South Dakota14.5¢$69
Tennessee14.9¢$71
Texas17.0¢$81
Utah13.3¢$64
Vermont24.6¢$117
Virginia17.4¢$83
Washington14.4¢$69
West Virginia16.1¢$77
Wisconsin19.2¢$92
Wyoming14.7¢$70

Certified models closest in efficiency

top-freezer refrigerators within reach of 478 kWh/yr
ModelkWh/yr$/yr (US avg)
Hisense RT210N3S*EHmost efficient478$90
Hisense RT21N3**Emost efficient478$90
Mora RT210N3A*EMmost efficient478$90
Samsung RT21M62*3most efficient478$90
GE GIE21GSHmost efficient480$90
GE GIE21GTHmost efficient480$90

Run your own numbers

Your rate, your numbers

Per day
25¢
Per month
$7.50
Per year
$90

478 kWh/yr × 18.8¢/kWh = $90/yr

Prefilled with this model's certified 478 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 RT21M62*5 use?
ENERGY STAR certifies the Samsung RT21M62*5 at 478 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 RT21M62*5 cost to run per month?
About $7.50 a month at the U.S. average residential rate (18.8¢/kWh) — 25¢ a day, or $90 a year. Your state's rate moves this up or down; see the table above.
Is the Samsung RT21M62*5 energy efficient?
It uses 32% more electricity than the median certified top-freezer refrigerator, which puts it among the least efficient certified models. It also meets ENERGY STAR's Most Efficient criteria.
What does the Samsung RT21M62*5 cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $59 a year in North Dakota (12.3¢/kWh) and $223 in Hawaii (46.6¢/kWh).
How many watts does the Samsung RT21M62*5 draw on average?
Spread over a year of continuous operation, 478 kWh works out to an average draw of about 55 watts — like leaving a 55-watt bulb on 24/7.

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