WattCost

Data through June 2026

Running cost · Refrigerators · ENERGY STAR certified

Samsung RF31CG7400

Running around the clock, the Samsung RF31CG7400 uses a certified 774 kWh per year — about $142 at the U.S. average rate, or $11.83 a month, the equivalent of a steady 88-watt draw. It sits near the bottom of the certified table — using 37% more than the median bottom-freezer refrigerator (rank 1447 of 1478) — so the state you live in matters more than usual. The same unit costs $101 a year in Nevada but $408 in Hawaii — electricity rates, not the appliance, make the difference.

Uses 5% 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

$142/yr

$7.70 · cheapest certified refrigerators$148 · priciest
Per month
$11.83
Per day
39¢
Certified use
774 kWh/yr
Configuration
Bottom Freezer
Total capacity
29.8 cu ft
Defrost
Automatic
Ice maker
Yes
Through-door dispenser
Yes
42 kWh805 kWh
Where the Samsung RF31CG7400 (▮) sits among all 4,371 certified refrigerators, by annual kWh

What it costs in every state

Samsung RF31CG7400: 774 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama16.4¢$127
Alaska28.2¢$218
Arizona15.2¢$117
Arkansas14.1¢$109
California34.7¢$269
Colorado17.1¢$133
Connecticut24.3¢$188
Delaware19.3¢$149
District of Columbia24.4¢$189
Florida15.1¢$117
Georgia16.4¢$127
Hawaiipriciest52.7¢$408
Idaho14.4¢$111
Illinois19.9¢$154
Indiana17.5¢$136
Iowa15.9¢$123
Kansas15.7¢$122
Kentucky14.3¢$110
Louisiana13.5¢$104
Maine29.6¢$229
Maryland21.8¢$169
Massachusetts29.6¢$229
Michigan23.0¢$178
Minnesota17.5¢$136
Mississippi14.9¢$115
Missouri16.2¢$126
Montana15.1¢$117
Nebraska13.3¢$103
Nevadacheapest13.1¢$101
New Hampshire27.0¢$209
New Jersey24.9¢$193
New Mexico15.1¢$117
New York29.5¢$228
North Carolina14.7¢$114
North Dakota14.1¢$109
Ohio19.2¢$149
Oklahoma14.3¢$111
Oregon16.3¢$126
Pennsylvania21.7¢$168
Rhode Island29.2¢$226
South Carolina15.6¢$120
South Dakota15.4¢$119
Tennessee14.1¢$109
Texas15.9¢$123
Utah13.4¢$103
Vermont24.4¢$189
Virginia17.2¢$133
Washington14.9¢$115
West Virginia15.4¢$120
Wisconsin19.6¢$151
Wyoming15.2¢$118

Certified models closest in efficiency

bottom-freezer refrigerators within reach of 774 kWh/yr
ModelkWh/yr$/yr (US avg)
Café CQE28DM*N776$142
Samsung RF32CG5900781$143
Criterion CFDR286M4782$143
KUCHT KR900X782$143
Midea MDRF1100FGF04PRG782$143
Midea MRF29D2782$143

Run your own numbers

Your rate, your numbers

Per day
39¢
Per month
$11.83
Per year
$142

774 kWh/yr × 18.3¢/kWh = $142/yr

Prefilled with this model's certified 774 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 RF31CG7400 use?
ENERGY STAR certifies the Samsung RF31CG7400 at 774 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 RF31CG7400 cost to run per month?
About $11.83 a month at the U.S. average residential rate (18.3¢/kWh) — 39¢ a day, or $142 a year. Your state's rate moves this up or down; see the table above.
Is the Samsung RF31CG7400 energy efficient?
It uses 37% more electricity than the median certified bottom-freezer refrigerator, which puts it among the least efficient certified models.
What does the Samsung RF31CG7400 cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $101 a year in Nevada (13.1¢/kWh) and $408 in Hawaii (52.7¢/kWh).
How many watts does the Samsung RF31CG7400 draw on average?
Spread over a year of continuous operation, 774 kWh works out to an average draw of about 88 watts — like leaving a 88-watt bulb on 24/7.

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