Data through April 2026
Running cost · Computer Monitors · ENERGY STAR certified
WACOM DTC121
At the standardized usage ENERGY STAR assumes, the WACOM DTC121 consumes 19 kWh a year — about $3.56 at the U.S. average electricity rate ($0.30 a month). That puts it in the most efficient tenth of every certified computer monitor — 58% less electricity than the median, ranked 32 of 1482. The same unit costs $2.34 a year in North Dakota but $8.82 in Hawaii — electricity rates, not the appliance, make the difference.
Estimated annual running cost · U.S. average rate 18.8¢/kWh
$3.56/yr
- Per month
- $0.30
- Per day
- 1¢
- Certified use
- 19 kWh/yr
- Screen size
- 11.6 in
- Panel
- IPS LCD
- On-mode power
- 4.7 W
- Sleep-mode power
- 0.79 W
What it costs in every state
| State | Rate ¢/kWh | This model $/yr | Relative cost |
|---|---|---|---|
| Alabama | 17.4¢ | $3.29 | |
| Alaska | 27.4¢ | $5.17 | |
| Arizona | 15.5¢ | $2.93 | |
| Arkansas | 14.2¢ | $2.68 | |
| California | 35.3¢ | $6.67 | |
| Colorado | 16.5¢ | $3.13 | |
| Connecticut | 32.2¢ | $6.10 | |
| Delaware | 18.8¢ | $3.55 | |
| District of Columbia | 25.4¢ | $4.81 | |
| Florida | 15.4¢ | $2.91 | |
| Georgia | 15.4¢ | $2.91 | |
| Hawaiipriciest | 46.6¢ | $8.82 | |
| Idaho | 12.7¢ | $2.40 | |
| Illinois | 20.5¢ | $3.87 | |
| Indiana | 17.9¢ | $3.38 | |
| Iowa | 13.9¢ | $2.62 | |
| Kansas | 15.8¢ | $2.98 | |
| Kentucky | 15.0¢ | $2.84 | |
| Louisiana | 14.4¢ | $2.73 | |
| Maine | 28.4¢ | $5.37 | |
| Maryland | 22.1¢ | $4.17 | |
| Massachusetts | 29.4¢ | $5.57 | |
| Michigan | 21.4¢ | $4.04 | |
| Minnesota | 16.4¢ | $3.10 | |
| Mississippi | 16.8¢ | $3.17 | |
| Missouri | 14.0¢ | $2.65 | |
| Montana | 13.9¢ | $2.63 | |
| Nebraska | 13.3¢ | $2.51 | |
| Nevada | 14.3¢ | $2.70 | |
| New Hampshire | 27.2¢ | $5.15 | |
| New Jersey | 23.5¢ | $4.45 | |
| New Mexico | 15.2¢ | $2.86 | |
| New York | 29.4¢ | $5.57 | |
| North Carolina | 16.3¢ | $3.07 | |
| North Dakotacheapest | 12.3¢ | $2.34 | |
| Ohio | 19.5¢ | $3.69 | |
| Oklahoma | 13.3¢ | $2.52 | |
| Oregon | 15.8¢ | $2.98 | |
| Pennsylvania | 21.5¢ | $4.06 | |
| Rhode Island | 28.3¢ | $5.35 | |
| South Carolina | 17.1¢ | $3.23 | |
| South Dakota | 14.5¢ | $2.75 | |
| Tennessee | 14.9¢ | $2.83 | |
| Texas | 17.0¢ | $3.21 | |
| Utah | 13.3¢ | $2.51 | |
| Vermont | 24.6¢ | $4.64 | |
| Virginia | 17.4¢ | $3.29 | |
| Washington | 14.4¢ | $2.72 | |
| West Virginia | 16.1¢ | $3.04 | |
| Wisconsin | 19.2¢ | $3.63 | |
| Wyoming | 14.7¢ | $2.78 |
Certified models closest in efficiency
| Model | kWh/yr | $/yr (US avg) |
|---|---|---|
| ASUS MB16AHVE | 19 | $3.56 |
| ASUS MB166 | 19 | $3.57 |
| HP Engage 14 | 19 | $3.53 |
| Acer PE160W | 19 | $3.60 |
| ELO ET1304LS | 19 | $3.50 |
| ELO ET1510L | 19 | $3.50 |
Run your own numbers
Your rate, your numbers
- Per day
- 1¢
- Per month
- $0.30
- Per year
- $3.58
19 kWh/yr × 18.8¢/kWh = $3.58/yr
Prefilled with this model's certified 19 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 WACOM DTC121 use?
- ENERGY STAR certifies the WACOM DTC121 at 19 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 WACOM DTC121 cost to run per month?
- About $0.30 a month at the U.S. average residential rate (18.8¢/kWh) — 1¢ a day, or $3.56 a year. Your state's rate moves this up or down; see the table above.
- Is the WACOM DTC121 energy efficient?
- It uses 58% less electricity than the median certified computer monitor, placing it in the top 10% of certified models.
- What does the WACOM DTC121 cost to run in the cheapest vs. priciest state?
- At current residential rates it costs about $2.34 a year in North Dakota (12.3¢/kWh) and $8.82 in Hawaii (46.6¢/kWh).