Data through June 2026
Running cost · Computer Monitors · ENERGY STAR certified
LG 27BF640B
The LG 27BF640B's certified consumption is 50 kWh per year, which prices out to about $9.11 at the national average rate — your hours of use scale that directly. Efficiency-wise it's unremarkable in a good way: within 10% of the median certified computer monitor (rank 922 of 1530). The same unit costs $6.51 a year in Nevada but $26 in Hawaii — electricity rates, not the appliance, make the difference.
Estimated annual running cost · U.S. average rate 18.3¢/kWh
$9.11/yr
- Per month
- $0.76
- Per day
- 2¢
- Certified use
- 50 kWh/yr
- Screen size
- 27 in
- Panel
- IPS LCD
- On-mode power
- 15.84 W
- Sleep-mode power
- 0.19 W
What it costs in every state
| State | Rate ¢/kWh | This model $/yr | Relative cost |
|---|---|---|---|
| Alabama | 16.4¢ | $8.14 | |
| Alaska | 28.2¢ | $14 | |
| Arizona | 15.2¢ | $7.54 | |
| Arkansas | 14.1¢ | $7.01 | |
| California | 34.7¢ | $17 | |
| Colorado | 17.1¢ | $8.51 | |
| Connecticut | 24.3¢ | $12 | |
| Delaware | 19.3¢ | $9.58 | |
| District of Columbia | 24.4¢ | $12 | |
| Florida | 15.1¢ | $7.50 | |
| Georgia | 16.4¢ | $8.12 | |
| Hawaiipriciest | 52.7¢ | $26 | |
| Idaho | 14.4¢ | $7.13 | |
| Illinois | 19.9¢ | $9.88 | |
| Indiana | 17.5¢ | $8.69 | |
| Iowa | 15.9¢ | $7.91 | |
| Kansas | 15.7¢ | $7.80 | |
| Kentucky | 14.3¢ | $7.08 | |
| Louisiana | 13.5¢ | $6.70 | |
| Maine | 29.6¢ | $15 | |
| Maryland | 21.8¢ | $11 | |
| Massachusetts | 29.6¢ | $15 | |
| Michigan | 23.0¢ | $11 | |
| Minnesota | 17.5¢ | $8.70 | |
| Mississippi | 14.9¢ | $7.39 | |
| Missouri | 16.2¢ | $8.05 | |
| Montana | 15.1¢ | $7.52 | |
| Nebraska | 13.3¢ | $6.58 | |
| Nevadacheapest | 13.1¢ | $6.51 | |
| New Hampshire | 27.0¢ | $13 | |
| New Jersey | 24.9¢ | $12 | |
| New Mexico | 15.1¢ | $7.48 | |
| New York | 29.5¢ | $15 | |
| North Carolina | 14.7¢ | $7.32 | |
| North Dakota | 14.1¢ | $7.01 | |
| Ohio | 19.2¢ | $9.53 | |
| Oklahoma | 14.3¢ | $7.11 | |
| Oregon | 16.3¢ | $8.10 | |
| Pennsylvania | 21.7¢ | $11 | |
| Rhode Island | 29.2¢ | $15 | |
| South Carolina | 15.6¢ | $7.72 | |
| South Dakota | 15.4¢ | $7.63 | |
| Tennessee | 14.1¢ | $6.99 | |
| Texas | 15.9¢ | $7.91 | |
| Utah | 13.4¢ | $6.64 | |
| Vermont | 24.4¢ | $12 | |
| Virginia | 17.2¢ | $8.55 | |
| Washington | 14.9¢ | $7.40 | |
| West Virginia | 15.4¢ | $7.67 | |
| Wisconsin | 19.6¢ | $9.71 | |
| Wyoming | 15.2¢ | $7.57 |
Certified models closest in efficiency
| Model | kWh/yr | $/yr (US avg) |
|---|---|---|
| AOC 24E4CV | 50 | $9.10 |
| AOC 27E3 | 50 | $9.10 |
| PHILIPS 255P1 | 50 | $9.12 |
| DELL P2425Dc | 50 | $9.09 |
| PHILIPS 27B2G5601 | 50 | $9.13 |
| PHILIPS 24B2U4301H | 50 | $9.14 |
Run your own numbers
Your rate, your numbers
- Per day
- 3¢
- Per month
- $0.76
- Per year
- $9.17
50 kWh/yr × 18.3¢/kWh = $9.17/yr
Prefilled with this model's certified 50 kWh/yr — adjust if your usage differs from the DOE test basis. The certified annual kWh (TEC) assumes the monitor is on 35% of the day and asleep the other 65%, per the ENERGY STAR test basis.
Questions, answered with the data
- How much electricity does the LG 27BF640B use?
- ENERGY STAR certifies the LG 27BF640B at 50 kWh per year. The certified annual kWh (TEC) assumes the monitor is on 35% of the day and asleep the other 65%, per the ENERGY STAR test basis.
- How much does the LG 27BF640B cost to run per month?
- About $0.76 a month at the U.S. average residential rate (18.3¢/kWh) — 2¢ a day, or $9.11 a year. Your state's rate moves this up or down; see the table above.
- Is the LG 27BF640B energy efficient?
- It uses 10% more electricity than the median certified computer monitor.
- What does the LG 27BF640B cost to run in the cheapest vs. priciest state?
- At current residential rates it costs about $6.51 a year in Nevada (13.1¢/kWh) and $26 in Hawaii (52.7¢/kWh).