WattCost

Data through April 2026

Running cost · Refrigerators · ENERGY STAR certified

Samsung RF31CG7400

Running around the clock, the Samsung RF31CG7400 uses a certified 774 kWh per year — about $146 at the U.S. average rate, or $12.15 a month, the equivalent of a steady 88-watt draw. It sits near the bottom of the certified table — using 38% more than the median bottom-freezer refrigerator (rank 1428 of 1458) — so the state you live in matters more than usual. The same unit costs $96 a year in North Dakota but $361 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 18.8¢/kWh

$146/yr

$7.91 · cheapest certified refrigerators$152 · priciest
Per month
$12.15
Per day
40¢
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 4,229 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
Alabama17.4¢$135
Alaska27.4¢$212
Arizona15.5¢$120
Arkansas14.2¢$110
California35.3¢$273
Colorado16.5¢$128
Connecticut32.2¢$250
Delaware18.8¢$145
District of Columbia25.4¢$197
Florida15.4¢$119
Georgia15.4¢$119
Hawaiipriciest46.6¢$361
Idaho12.7¢$98
Illinois20.5¢$158
Indiana17.9¢$139
Iowa13.9¢$107
Kansas15.8¢$122
Kentucky15.0¢$116
Louisiana14.4¢$112
Maine28.4¢$220
Maryland22.1¢$171
Massachusetts29.4¢$228
Michigan21.4¢$166
Minnesota16.4¢$127
Mississippi16.8¢$130
Missouri14.0¢$108
Montana13.9¢$108
Nebraska13.3¢$103
Nevada14.3¢$111
New Hampshire27.2¢$211
New Jersey23.5¢$182
New Mexico15.2¢$117
New York29.4¢$228
North Carolina16.3¢$126
North Dakotacheapest12.3¢$96
Ohio19.5¢$151
Oklahoma13.3¢$103
Oregon15.8¢$122
Pennsylvania21.5¢$166
Rhode Island28.3¢$219
South Carolina17.1¢$132
South Dakota14.5¢$112
Tennessee14.9¢$116
Texas17.0¢$132
Utah13.3¢$103
Vermont24.6¢$190
Virginia17.4¢$135
Washington14.4¢$111
West Virginia16.1¢$124
Wisconsin19.2¢$149
Wyoming14.7¢$114

Certified models closest in efficiency

bottom-freezer refrigerators within reach of 774 kWh/yr
ModelkWh/yr$/yr (US avg)
Café CQE28DM*N776$146
Samsung RF32CG5900781$147
Criterion CFDR286M4782$147
KUCHT KR900X782$147
Midea MDRF1100FGF04PRG782$147
Midea MRF29D2782$147

Run your own numbers

Your rate, your numbers

Per day
40¢
Per month
$12.15
Per year
$146

774 kWh/yr × 18.8¢/kWh = $146/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 $12.15 a month at the U.S. average residential rate (18.8¢/kWh) — 40¢ a day, or $146 a year. Your state's rate moves this up or down; see the table above.
Is the Samsung RF31CG7400 energy efficient?
It uses 38% 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 $96 a year in North Dakota (12.3¢/kWh) and $361 in Hawaii (46.6¢/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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