WattCost

Data through June 2026

Running cost · Refrigerators · ENERGY STAR certified

Samsung RT18DG6500

Running around the clock, the Samsung RT18DG6500 uses a certified 343 kWh per year — about $63 at the U.S. average rate, or $5.24 a month, the equivalent of a steady 39-watt draw. Compared with the median certified top-freezer refrigerator, it uses 6% less electricity — rank 245 out of 713. Where you live moves the bill from $45 a year in Nevada to $181 in Hawaii. It also meets ENERGY STAR's stricter “Most Efficient” criteria.

Uses 15% less energy than the U.S. federal minimum

Dimensions 66.8" H × 28.8" W

Estimated annual running cost · U.S. average rate 18.3¢/kWh

$63/yr

$7.70 · cheapest certified refrigerators$148 · priciest
Per month
$5.24
Per day
17¢
Certified use
343 kWh/yr
Configuration
Top Freezer
Total capacity
17.5 cu ft
Defrost
Automatic
Ice maker
No
Through-door dispenser
No
42 kWh805 kWh
Where the Samsung RT18DG6500 (▮) sits among all 4,371 certified refrigerators, by annual kWh

What it costs in every state

Samsung RT18DG6500: 343 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama16.4¢$56
Alaska28.2¢$97
Arizona15.2¢$52
Arkansas14.1¢$48
California34.7¢$119
Colorado17.1¢$59
Connecticut24.3¢$83
Delaware19.3¢$66
District of Columbia24.4¢$84
Florida15.1¢$52
Georgia16.4¢$56
Hawaiipriciest52.7¢$181
Idaho14.4¢$49
Illinois19.9¢$68
Indiana17.5¢$60
Iowa15.9¢$55
Kansas15.7¢$54
Kentucky14.3¢$49
Louisiana13.5¢$46
Maine29.6¢$101
Maryland21.8¢$75
Massachusetts29.6¢$102
Michigan23.0¢$79
Minnesota17.5¢$60
Mississippi14.9¢$51
Missouri16.2¢$56
Montana15.1¢$52
Nebraska13.3¢$45
Nevadacheapest13.1¢$45
New Hampshire27.0¢$93
New Jersey24.9¢$86
New Mexico15.1¢$52
New York29.5¢$101
North Carolina14.7¢$51
North Dakota14.1¢$48
Ohio19.2¢$66
Oklahoma14.3¢$49
Oregon16.3¢$56
Pennsylvania21.7¢$75
Rhode Island29.2¢$100
South Carolina15.6¢$53
South Dakota15.4¢$53
Tennessee14.1¢$48
Texas15.9¢$55
Utah13.4¢$46
Vermont24.4¢$84
Virginia17.2¢$59
Washington14.9¢$51
West Virginia15.4¢$53
Wisconsin19.6¢$67
Wyoming15.2¢$52

Certified models closest in efficiency

top-freezer refrigerators within reach of 343 kWh/yr
ModelkWh/yr$/yr (US avg)
Samsung RT70F18LRmost efficient343$63
LG LT18S1100most efficient344$63
LG LT18S2100most efficient344$63
GE GTE16DTNmost efficient345$63
GE GTE16GTNmost efficient345$63
Hotpoint HPE16BTNmost efficient345$63

Run your own numbers

Your rate, your numbers

Per day
17¢
Per month
$5.24
Per year
$63

343 kWh/yr × 18.3¢/kWh = $63/yr

Prefilled with this model's certified 343 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 RT18DG6500 use?
ENERGY STAR certifies the Samsung RT18DG6500 at 343 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 RT18DG6500 cost to run per month?
About $5.24 a month at the U.S. average residential rate (18.3¢/kWh) — 17¢ a day, or $63 a year. Your state's rate moves this up or down; see the table above.
Is the Samsung RT18DG6500 energy efficient?
It uses 6% less electricity than the median certified top-freezer refrigerator, placing it in the efficient third of certified models. It also meets ENERGY STAR's Most Efficient criteria.
What does the Samsung RT18DG6500 cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $45 a year in Nevada (13.1¢/kWh) and $181 in Hawaii (52.7¢/kWh).
How many watts does the Samsung RT18DG6500 draw on average?
Spread over a year of continuous operation, 343 kWh works out to an average draw of about 39 watts — like leaving a 39-watt bulb on 24/7.

Keep digging