Data through April 2026
Running cost · Freezers · ENERGY STAR certified
KOOLMORE KM-RUF-42C
The KOOLMORE KM-RUF-42C never switches off, and its certified 260 kWh a year works out to about $49 on a U.S.-average electric bill — roughly $4.08 a month for an average continuous draw of 30 watts. That's close to the middle of the certified pack — about 6% above the median compact freezer, ranked 75 of 128. Where you live moves the bill from $32 a year in North Dakota to $121 in Hawaii.
Estimated annual running cost · U.S. average rate 18.8¢/kWh
$49/yr
- Per month
- $4.08
- Per day
- 13¢
- Certified use
- 260 kWh/yr
- Configuration
- Compact
- Total capacity
- 4.2 cu ft
- Defrost
- Manual
- Compact
- Yes
What it costs in every state
| State | Rate ¢/kWh | This model $/yr | Relative cost |
|---|---|---|---|
| Alabama | 17.4¢ | $45 | |
| Alaska | 27.4¢ | $71 | |
| Arizona | 15.5¢ | $40 | |
| Arkansas | 14.2¢ | $37 | |
| California | 35.3¢ | $92 | |
| Colorado | 16.5¢ | $43 | |
| Connecticut | 32.2¢ | $84 | |
| Delaware | 18.8¢ | $49 | |
| District of Columbia | 25.4¢ | $66 | |
| Florida | 15.4¢ | $40 | |
| Georgia | 15.4¢ | $40 | |
| Hawaiipriciest | 46.6¢ | $121 | |
| Idaho | 12.7¢ | $33 | |
| Illinois | 20.5¢ | $53 | |
| Indiana | 17.9¢ | $47 | |
| Iowa | 13.9¢ | $36 | |
| Kansas | 15.8¢ | $41 | |
| Kentucky | 15.0¢ | $39 | |
| Louisiana | 14.4¢ | $38 | |
| Maine | 28.4¢ | $74 | |
| Maryland | 22.1¢ | $57 | |
| Massachusetts | 29.4¢ | $77 | |
| Michigan | 21.4¢ | $56 | |
| Minnesota | 16.4¢ | $43 | |
| Mississippi | 16.8¢ | $44 | |
| Missouri | 14.0¢ | $36 | |
| Montana | 13.9¢ | $36 | |
| Nebraska | 13.3¢ | $35 | |
| Nevada | 14.3¢ | $37 | |
| New Hampshire | 27.2¢ | $71 | |
| New Jersey | 23.5¢ | $61 | |
| New Mexico | 15.2¢ | $39 | |
| New York | 29.4¢ | $77 | |
| North Carolina | 16.3¢ | $42 | |
| North Dakotacheapest | 12.3¢ | $32 | |
| Ohio | 19.5¢ | $51 | |
| Oklahoma | 13.3¢ | $35 | |
| Oregon | 15.8¢ | $41 | |
| Pennsylvania | 21.5¢ | $56 | |
| Rhode Island | 28.3¢ | $74 | |
| South Carolina | 17.1¢ | $44 | |
| South Dakota | 14.5¢ | $38 | |
| Tennessee | 14.9¢ | $39 | |
| Texas | 17.0¢ | $44 | |
| Utah | 13.3¢ | $35 | |
| Vermont | 24.6¢ | $64 | |
| Virginia | 17.4¢ | $45 | |
| Washington | 14.4¢ | $37 | |
| West Virginia | 16.1¢ | $42 | |
| Wisconsin | 19.2¢ | $50 | |
| Wyoming | 14.7¢ | $38 |
Certified models closest in efficiency
| Model | kWh/yr | $/yr (US avg) |
|---|---|---|
| Conserv FR430B | 260 | $49 |
| Conserv FR430S | 260 | $49 |
| Conserv FR430SC | 260 | $49 |
| Danby Designer DUFM043A2 | 260 | $49 |
| VITARA VLUF0430EW | 260 | $49 |
| FINLUX 2451 DUF1650WHmost efficient | 256 | $48 |
Run your own numbers
Your rate, your numbers
- Per day
- 13¢
- Per month
- $4.08
- Per year
- $49
260 kWh/yr × 18.8¢/kWh = $49/yr
Prefilled with this model's certified 260 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.
Questions, answered with the data
- How much electricity does the KOOLMORE KM-RUF-42C use?
- ENERGY STAR certifies the KOOLMORE KM-RUF-42C at 260 kWh per year. The certified annual kWh comes from the DOE test procedure, which measures continuous 24/7 operation at standardized temperatures.
- How much does the KOOLMORE KM-RUF-42C cost to run per month?
- About $4.08 a month at the U.S. average residential rate (18.8¢/kWh) — 13¢ a day, or $49 a year. Your state's rate moves this up or down; see the table above.
- Is the KOOLMORE KM-RUF-42C energy efficient?
- It uses 6% more electricity than the median certified compact freezer.
- What does the KOOLMORE KM-RUF-42C cost to run in the cheapest vs. priciest state?
- At current residential rates it costs about $32 a year in North Dakota (12.3¢/kWh) and $121 in Hawaii (46.6¢/kWh).
- How many watts does the KOOLMORE KM-RUF-42C draw on average?
- Spread over a year of continuous operation, 260 kWh works out to an average draw of about 30 watts — like leaving a 30-watt bulb on 24/7.