WattCost

Data through June 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 $88 at the U.S. average rate, or $7.31 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 697 of 713) — so the state you live in matters more than usual. Where you live moves the bill from $63 a year in Nevada to $252 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 18.3¢/kWh

$88/yr

$7.70 · cheapest certified refrigerators$148 · priciest
Per month
$7.31
Per day
24¢
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 4,371 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
Alabama16.4¢$78
Alaska28.2¢$135
Arizona15.2¢$73
Arkansas14.1¢$67
California34.7¢$166
Colorado17.1¢$82
Connecticut24.3¢$116
Delaware19.3¢$92
District of Columbia24.4¢$117
Florida15.1¢$72
Georgia16.4¢$78
Hawaiipriciest52.7¢$252
Idaho14.4¢$69
Illinois19.9¢$95
Indiana17.5¢$84
Iowa15.9¢$76
Kansas15.7¢$75
Kentucky14.3¢$68
Louisiana13.5¢$64
Maine29.6¢$141
Maryland21.8¢$104
Massachusetts29.6¢$142
Michigan23.0¢$110
Minnesota17.5¢$84
Mississippi14.9¢$71
Missouri16.2¢$78
Montana15.1¢$72
Nebraska13.3¢$63
Nevadacheapest13.1¢$63
New Hampshire27.0¢$129
New Jersey24.9¢$119
New Mexico15.1¢$72
New York29.5¢$141
North Carolina14.7¢$70
North Dakota14.1¢$67
Ohio19.2¢$92
Oklahoma14.3¢$68
Oregon16.3¢$78
Pennsylvania21.7¢$104
Rhode Island29.2¢$140
South Carolina15.6¢$74
South Dakota15.4¢$73
Tennessee14.1¢$67
Texas15.9¢$76
Utah13.4¢$64
Vermont24.4¢$117
Virginia17.2¢$82
Washington14.9¢$71
West Virginia15.4¢$74
Wisconsin19.6¢$93
Wyoming15.2¢$73

Certified models closest in efficiency

top-freezer refrigerators within reach of 478 kWh/yr
ModelkWh/yr$/yr (US avg)
Hisense RT210N3S*EHmost efficient478$88
Hisense RT21N3**Emost efficient478$88
Mora RT210N3A*EMmost efficient478$88
Samsung RT21M62*3most efficient478$88
GE GIE21GSHmost efficient480$88
GE GIE21GTHmost efficient480$88

Run your own numbers

Your rate, your numbers

Per day
24¢
Per month
$7.31
Per year
$88

478 kWh/yr × 18.3¢/kWh = $88/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 $7.31 a month at the U.S. average residential rate (18.3¢/kWh) — 24¢ a day, or $88 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 $63 a year in Nevada (13.1¢/kWh) and $252 in Hawaii (52.7¢/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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