Data through June 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 $6.00 at the U.S. average electricity rate ($0.50 a month). Compared with the median certified computer monitor, it uses 27% less electricity — rank 181 out of 1530. Where you live moves the bill from $4.29 a year in Nevada to $17 in Hawaii.
Estimated annual running cost · U.S. average rate 18.3¢/kWh
$6.00/yr
- Per month
- $0.50
- 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 | 16.4¢ | $5.37 | |
| Alaska | 28.2¢ | $9.24 | |
| Arizona | 15.2¢ | $4.97 | |
| Arkansas | 14.1¢ | $4.62 | |
| California | 34.7¢ | $11 | |
| Colorado | 17.1¢ | $5.61 | |
| Connecticut | 24.3¢ | $7.96 | |
| Delaware | 19.3¢ | $6.32 | |
| District of Columbia | 24.4¢ | $7.99 | |
| Florida | 15.1¢ | $4.94 | |
| Georgia | 16.4¢ | $5.36 | |
| Hawaiipriciest | 52.7¢ | $17 | |
| Idaho | 14.4¢ | $4.70 | |
| Illinois | 19.9¢ | $6.51 | |
| Indiana | 17.5¢ | $5.73 | |
| Iowa | 15.9¢ | $5.22 | |
| Kansas | 15.7¢ | $5.14 | |
| Kentucky | 14.3¢ | $4.67 | |
| Louisiana | 13.5¢ | $4.42 | |
| Maine | 29.6¢ | $9.69 | |
| Maryland | 21.8¢ | $7.15 | |
| Massachusetts | 29.6¢ | $9.69 | |
| Michigan | 23.0¢ | $7.53 | |
| Minnesota | 17.5¢ | $5.74 | |
| Mississippi | 14.9¢ | $4.87 | |
| Missouri | 16.2¢ | $5.31 | |
| Montana | 15.1¢ | $4.96 | |
| Nebraska | 13.3¢ | $4.34 | |
| Nevadacheapest | 13.1¢ | $4.29 | |
| New Hampshire | 27.0¢ | $8.84 | |
| New Jersey | 24.9¢ | $8.17 | |
| New Mexico | 15.1¢ | $4.93 | |
| New York | 29.5¢ | $9.66 | |
| North Carolina | 14.7¢ | $4.83 | |
| North Dakota | 14.1¢ | $4.62 | |
| Ohio | 19.2¢ | $6.28 | |
| Oklahoma | 14.3¢ | $4.69 | |
| Oregon | 16.3¢ | $5.34 | |
| Pennsylvania | 21.7¢ | $7.11 | |
| Rhode Island | 29.2¢ | $9.57 | |
| South Carolina | 15.6¢ | $5.09 | |
| South Dakota | 15.4¢ | $5.03 | |
| Tennessee | 14.1¢ | $4.61 | |
| Texas | 15.9¢ | $5.22 | |
| Utah | 13.4¢ | $4.38 | |
| Vermont | 24.4¢ | $8.00 | |
| Virginia | 17.2¢ | $5.64 | |
| Washington | 14.9¢ | $4.88 | |
| West Virginia | 15.4¢ | $5.06 | |
| Wisconsin | 19.6¢ | $6.40 | |
| Wyoming | 15.2¢ | $4.99 |
Certified models closest in efficiency
| Model | kWh/yr | $/yr (US avg) |
|---|---|---|
| Acer EK221Q | 33 | $6.00 |
| AOC 195LM00003 | 33 | $6.00 |
| AOpen 22CV1Q | 33 | $6.00 |
| DELL E2225HMt | 33 | $6.02 |
| XITRIX XPN-WFPV2413 | 33 | $5.99 |
| Samsung S24R65*FD | 33 | $5.99 |
Run your own numbers
Your rate, your numbers
- Per day
- 2¢
- Per month
- $0.50
- Per year
- $6.05
33 kWh/yr × 18.3¢/kWh = $6.05/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 $0.50 a month at the U.S. average residential rate (18.3¢/kWh) — 2¢ a day, or $6.00 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 $4.29 a year in Nevada (13.1¢/kWh) and $17 in Hawaii (52.7¢/kWh).