Data through April 2026
Running cost · Computer Monitors · ENERGY STAR certified
ViewSonic VA3420C
The ViewSonic VA3420C's certified consumption is 91 kWh per year, which prices out to about $17 at the national average rate — your hours of use scale that directly. It sits near the bottom of the certified table — using 102% more than the median computer monitor (rank 1332 of 1482) — so the state you live in matters more than usual. Where you live moves the bill from $11 a year in North Dakota to $43 in Hawaii.
Estimated annual running cost · U.S. average rate 18.8¢/kWh
$17/yr
- Per month
- $1.43
- Per day
- 5¢
- Certified use
- 91 kWh/yr
- Screen size
- 34.1 in
- Panel
- IPS LCD
- On-mode power
- 29.24 W
- Sleep-mode power
- 0.28 W
What it costs in every state
| State | Rate ¢/kWh | This model $/yr | Relative cost |
|---|---|---|---|
| Alabama | 17.4¢ | $16 | |
| Alaska | 27.4¢ | $25 | |
| Arizona | 15.5¢ | $14 | |
| Arkansas | 14.2¢ | $13 | |
| California | 35.3¢ | $32 | |
| Colorado | 16.5¢ | $15 | |
| Connecticut | 32.2¢ | $29 | |
| Delaware | 18.8¢ | $17 | |
| District of Columbia | 25.4¢ | $23 | |
| Florida | 15.4¢ | $14 | |
| Georgia | 15.4¢ | $14 | |
| Hawaiipriciest | 46.6¢ | $43 | |
| Idaho | 12.7¢ | $12 | |
| Illinois | 20.5¢ | $19 | |
| Indiana | 17.9¢ | $16 | |
| Iowa | 13.9¢ | $13 | |
| Kansas | 15.8¢ | $14 | |
| Kentucky | 15.0¢ | $14 | |
| Louisiana | 14.4¢ | $13 | |
| Maine | 28.4¢ | $26 | |
| Maryland | 22.1¢ | $20 | |
| Massachusetts | 29.4¢ | $27 | |
| Michigan | 21.4¢ | $20 | |
| Minnesota | 16.4¢ | $15 | |
| Mississippi | 16.8¢ | $15 | |
| Missouri | 14.0¢ | $13 | |
| Montana | 13.9¢ | $13 | |
| Nebraska | 13.3¢ | $12 | |
| Nevada | 14.3¢ | $13 | |
| New Hampshire | 27.2¢ | $25 | |
| New Jersey | 23.5¢ | $21 | |
| New Mexico | 15.2¢ | $14 | |
| New York | 29.4¢ | $27 | |
| North Carolina | 16.3¢ | $15 | |
| North Dakotacheapest | 12.3¢ | $11 | |
| Ohio | 19.5¢ | $18 | |
| Oklahoma | 13.3¢ | $12 | |
| Oregon | 15.8¢ | $14 | |
| Pennsylvania | 21.5¢ | $20 | |
| Rhode Island | 28.3¢ | $26 | |
| South Carolina | 17.1¢ | $16 | |
| South Dakota | 14.5¢ | $13 | |
| Tennessee | 14.9¢ | $14 | |
| Texas | 17.0¢ | $16 | |
| Utah | 13.3¢ | $12 | |
| Vermont | 24.6¢ | $22 | |
| Virginia | 17.4¢ | $16 | |
| Washington | 14.4¢ | $13 | |
| West Virginia | 16.1¢ | $15 | |
| Wisconsin | 19.2¢ | $18 | |
| Wyoming | 14.7¢ | $13 |
Certified models closest in efficiency
| Model | kWh/yr | $/yr (US avg) |
|---|---|---|
| LG 34BQ77QE | 91 | $17 |
| DELL U2723QEt | 91 | $17 |
| PHILIPS 34B2U36 | 91 | $17 |
| LG 32BN88U | 91 | $17 |
| Acer CB343CUR | 91 | $17 |
| Acer BM320 | 92 | $17 |
Run your own numbers
Your rate, your numbers
- Per day
- 5¢
- Per month
- $1.43
- Per year
- $17
91 kWh/yr × 18.8¢/kWh = $17/yr
Prefilled with this model's certified 91 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 ViewSonic VA3420C use?
- ENERGY STAR certifies the ViewSonic VA3420C at 91 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 ViewSonic VA3420C cost to run per month?
- About $1.43 a month at the U.S. average residential rate (18.8¢/kWh) — 5¢ a day, or $17 a year. Your state's rate moves this up or down; see the table above.
- Is the ViewSonic VA3420C energy efficient?
- It uses 102% more electricity than the median certified computer monitor, which puts it among the least efficient certified models.
- What does the ViewSonic VA3420C cost to run in the cheapest vs. priciest state?
- At current residential rates it costs about $11 a year in North Dakota (12.3¢/kWh) and $43 in Hawaii (46.6¢/kWh).