Data through April 2026
Running cost · Computer Monitors · ENERGY STAR certified
BenQ GW2490C-B
At the standardized usage ENERGY STAR assumes, the BenQ GW2490C-B consumes 33 kWh a year — about $6.16 at the U.S. average electricity rate ($0.51 a month). Compared with the median certified computer monitor, it uses 27% less electricity — rank 170 out of 1482. Where you live moves the bill from $4.04 a year in North Dakota to $15 in Hawaii.
Estimated annual running cost · U.S. average rate 18.8¢/kWh
$6.16/yr
- Per month
- $0.51
- Per day
- 2¢
- Certified use
- 33 kWh/yr
- Screen size
- 23.8 in
- Panel
- IPS LCD
- On-mode power
- 10.4 W
- Sleep-mode power
- 0.15 W
What it costs in every state
| State | Rate ¢/kWh | This model $/yr | Relative cost |
|---|---|---|---|
| Alabama | 17.4¢ | $5.70 | |
| Alaska | 27.4¢ | $8.95 | |
| Arizona | 15.5¢ | $5.07 | |
| Arkansas | 14.2¢ | $4.64 | |
| California | 35.3¢ | $12 | |
| Colorado | 16.5¢ | $5.42 | |
| Connecticut | 32.2¢ | $11 | |
| Delaware | 18.8¢ | $6.15 | |
| District of Columbia | 25.4¢ | $8.32 | |
| Florida | 15.4¢ | $5.04 | |
| Georgia | 15.4¢ | $5.03 | |
| Hawaiipriciest | 46.6¢ | $15 | |
| Idaho | 12.7¢ | $4.16 | |
| Illinois | 20.5¢ | $6.70 | |
| Indiana | 17.9¢ | $5.86 | |
| Iowa | 13.9¢ | $4.54 | |
| Kansas | 15.8¢ | $5.17 | |
| Kentucky | 15.0¢ | $4.92 | |
| Louisiana | 14.4¢ | $4.73 | |
| Maine | 28.4¢ | $9.30 | |
| Maryland | 22.1¢ | $7.23 | |
| Massachusetts | 29.4¢ | $9.64 | |
| Michigan | 21.4¢ | $7.00 | |
| Minnesota | 16.4¢ | $5.37 | |
| Mississippi | 16.8¢ | $5.49 | |
| Missouri | 14.0¢ | $4.59 | |
| Montana | 13.9¢ | $4.55 | |
| Nebraska | 13.3¢ | $4.35 | |
| Nevada | 14.3¢ | $4.68 | |
| New Hampshire | 27.2¢ | $8.92 | |
| New Jersey | 23.5¢ | $7.70 | |
| New Mexico | 15.2¢ | $4.96 | |
| New York | 29.4¢ | $9.64 | |
| North Carolina | 16.3¢ | $5.32 | |
| North Dakotacheapest | 12.3¢ | $4.04 | |
| Ohio | 19.5¢ | $6.38 | |
| Oklahoma | 13.3¢ | $4.36 | |
| Oregon | 15.8¢ | $5.17 | |
| Pennsylvania | 21.5¢ | $7.03 | |
| Rhode Island | 28.3¢ | $9.27 | |
| South Carolina | 17.1¢ | $5.59 | |
| South Dakota | 14.5¢ | $4.75 | |
| Tennessee | 14.9¢ | $4.89 | |
| Texas | 17.0¢ | $5.56 | |
| Utah | 13.3¢ | $4.35 | |
| Vermont | 24.6¢ | $8.04 | |
| Virginia | 17.4¢ | $5.69 | |
| Washington | 14.4¢ | $4.70 | |
| West Virginia | 16.1¢ | $5.26 | |
| Wisconsin | 19.2¢ | $6.29 | |
| Wyoming | 14.7¢ | $4.81 |
Certified models closest in efficiency
| Model | kWh/yr | $/yr (US avg) |
|---|---|---|
| Acer EK221Q | 33 | $6.16 |
| AOC 195LM00003 | 33 | $6.16 |
| AOpen 22CV1Q | 33 | $6.16 |
| DELL E2225HMt | 33 | $6.18 |
| XITRIX XPN-WFPV2413 | 33 | $6.15 |
| Samsung S24R65*FD | 33 | $6.15 |
Run your own numbers
Your rate, your numbers
- Per day
- 2¢
- Per month
- $0.52
- Per year
- $6.21
33 kWh/yr × 18.8¢/kWh = $6.21/yr
Prefilled with this model's certified 33 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 BenQ GW2490C-B use?
- ENERGY STAR certifies the BenQ GW2490C-B at 33 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 BenQ GW2490C-B cost to run per month?
- About $0.51 a month at the U.S. average residential rate (18.8¢/kWh) — 2¢ a day, or $6.16 a year. Your state's rate moves this up or down; see the table above.
- Is the BenQ GW2490C-B energy efficient?
- It uses 27% less electricity than the median certified computer monitor, placing it in the efficient third of certified models.
- What does the BenQ GW2490C-B cost to run in the cheapest vs. priciest state?
- At current residential rates it costs about $4.04 a year in North Dakota (12.3¢/kWh) and $15 in Hawaii (46.6¢/kWh).