Data through June 2026
Running cost · Computer Monitors · ENERGY STAR certified
Acer MK221Q
The Acer MK221Q's certified consumption is 37 kWh per year, which prices out to about $6.74 at the national average rate — your hours of use scale that directly. Compared with the median certified computer monitor, it uses 18% less electricity — rank 325 out of 1530. The same unit costs $4.82 a year in Nevada but $19 in Hawaii — electricity rates, not the appliance, make the difference.
Estimated annual running cost · U.S. average rate 18.3¢/kWh
$6.74/yr
- Per month
- $0.56
- Per day
- 2¢
- Certified use
- 37 kWh/yr
- Screen size
- 21.5 in
- Panel
- TFL-LCD
- On-mode power
- 11.84 W
- Sleep-mode power
- 0.08 W
What it costs in every state
| State | Rate ¢/kWh | This model $/yr | Relative cost |
|---|---|---|---|
| Alabama | 16.4¢ | $6.03 | |
| Alaska | 28.2¢ | $10 | |
| Arizona | 15.2¢ | $5.58 | |
| Arkansas | 14.1¢ | $5.19 | |
| California | 34.7¢ | $13 | |
| Colorado | 17.1¢ | $6.30 | |
| Connecticut | 24.3¢ | $8.94 | |
| Delaware | 19.3¢ | $7.09 | |
| District of Columbia | 24.4¢ | $8.97 | |
| Florida | 15.1¢ | $5.55 | |
| Georgia | 16.4¢ | $6.02 | |
| Hawaiipriciest | 52.7¢ | $19 | |
| Idaho | 14.4¢ | $5.28 | |
| Illinois | 19.9¢ | $7.31 | |
| Indiana | 17.5¢ | $6.44 | |
| Iowa | 15.9¢ | $5.86 | |
| Kansas | 15.7¢ | $5.78 | |
| Kentucky | 14.3¢ | $5.24 | |
| Louisiana | 13.5¢ | $4.96 | |
| Maine | 29.6¢ | $11 | |
| Maryland | 21.8¢ | $8.03 | |
| Massachusetts | 29.6¢ | $11 | |
| Michigan | 23.0¢ | $8.45 | |
| Minnesota | 17.5¢ | $6.44 | |
| Mississippi | 14.9¢ | $5.47 | |
| Missouri | 16.2¢ | $5.96 | |
| Montana | 15.1¢ | $5.57 | |
| Nebraska | 13.3¢ | $4.87 | |
| Nevadacheapest | 13.1¢ | $4.82 | |
| New Hampshire | 27.0¢ | $9.93 | |
| New Jersey | 24.9¢ | $9.17 | |
| New Mexico | 15.1¢ | $5.54 | |
| New York | 29.5¢ | $11 | |
| North Carolina | 14.7¢ | $5.42 | |
| North Dakota | 14.1¢ | $5.19 | |
| Ohio | 19.2¢ | $7.06 | |
| Oklahoma | 14.3¢ | $5.27 | |
| Oregon | 16.3¢ | $6.00 | |
| Pennsylvania | 21.7¢ | $7.99 | |
| Rhode Island | 29.2¢ | $11 | |
| South Carolina | 15.6¢ | $5.72 | |
| South Dakota | 15.4¢ | $5.65 | |
| Tennessee | 14.1¢ | $5.17 | |
| Texas | 15.9¢ | $5.86 | |
| Utah | 13.4¢ | $4.92 | |
| Vermont | 24.4¢ | $8.99 | |
| Virginia | 17.2¢ | $6.33 | |
| Washington | 14.9¢ | $5.48 | |
| West Virginia | 15.4¢ | $5.68 | |
| Wisconsin | 19.6¢ | $7.19 | |
| Wyoming | 15.2¢ | $5.60 |
Certified models closest in efficiency
| Model | kWh/yr | $/yr (US avg) |
|---|---|---|
| ASUS BE279QFKmost efficient | 37 | $6.74 |
| Lanix LX215 | 37 | $6.74 |
| HP E24 G4 | 37 | $6.75 |
| PHILIPS 22E2N11 | 37 | $6.76 |
| EIZO FlexScan EV2450 | 37 | $6.73 |
| ASUS VA249HG | 37 | $6.73 |
Run your own numbers
Your rate, your numbers
- Per day
- 2¢
- Per month
- $0.57
- Per year
- $6.79
37 kWh/yr × 18.3¢/kWh = $6.79/yr
Prefilled with this model's certified 37 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 Acer MK221Q use?
- ENERGY STAR certifies the Acer MK221Q at 37 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 Acer MK221Q cost to run per month?
- About $0.56 a month at the U.S. average residential rate (18.3¢/kWh) — 2¢ a day, or $6.74 a year. Your state's rate moves this up or down; see the table above.
- Is the Acer MK221Q energy efficient?
- It uses 18% less electricity than the median certified computer monitor, placing it in the efficient third of certified models.
- What does the Acer MK221Q cost to run in the cheapest vs. priciest state?
- At current residential rates it costs about $4.82 a year in Nevada (13.1¢/kWh) and $19 in Hawaii (52.7¢/kWh).