WattCost

Data through April 2026

Running cost · Computer Monitors · ENERGY STAR certified

ViewSonic VS20870

The ViewSonic VS20870's certified consumption is 31 kWh per year, which prices out to about $5.83 at the national average rate — your hours of use scale that directly. Only a handful of certified computer monitors do better: it ranks 125 of 1482 and undercuts the median by 31%. Where you live moves the bill from $3.82 a year in North Dakota to $14 in Hawaii. It also meets ENERGY STAR's stricter “Most Efficient” criteria.

Estimated annual running cost · U.S. average rate 18.8¢/kWh

$5.83/yr

$2.09 · cheapest certified computer monitors$76 · priciest
Per month
$0.49
Per day
2¢
Certified use
31 kWh/yr
Screen size
23.8 in
Panel
TFT-LCD
On-mode power
9.78 W
Sleep-mode power
0.17 W
11 kWh403 kWh
Where the ViewSonic VS20870 (▮) sits among all 1,482 certified computer monitors, by annual kWh

What it costs in every state

ViewSonic VS20870: 31 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama17.4¢$5.39
Alaska27.4¢$8.47
Arizona15.5¢$4.79
Arkansas14.2¢$4.38
California35.3¢$11
Colorado16.5¢$5.12
Connecticut32.2¢$9.98
Delaware18.8¢$5.82
District of Columbia25.4¢$7.87
Florida15.4¢$4.76
Georgia15.4¢$4.76
Hawaiipriciest46.6¢$14
Idaho12.7¢$3.93
Illinois20.5¢$6.34
Indiana17.9¢$5.54
Iowa13.9¢$4.29
Kansas15.8¢$4.89
Kentucky15.0¢$4.65
Louisiana14.4¢$4.47
Maine28.4¢$8.80
Maryland22.1¢$6.83
Massachusetts29.4¢$9.12
Michigan21.4¢$6.62
Minnesota16.4¢$5.07
Mississippi16.8¢$5.19
Missouri14.0¢$4.34
Montana13.9¢$4.30
Nebraska13.3¢$4.11
Nevada14.3¢$4.42
New Hampshire27.2¢$8.43
New Jersey23.5¢$7.28
New Mexico15.2¢$4.69
New York29.4¢$9.12
North Carolina16.3¢$5.03
North Dakotacheapest12.3¢$3.82
Ohio19.5¢$6.03
Oklahoma13.3¢$4.12
Oregon15.8¢$4.89
Pennsylvania21.5¢$6.65
Rhode Island28.3¢$8.76
South Carolina17.1¢$5.28
South Dakota14.5¢$4.50
Tennessee14.9¢$4.63
Texas17.0¢$5.26
Utah13.3¢$4.11
Vermont24.6¢$7.60
Virginia17.4¢$5.38
Washington14.4¢$4.45
West Virginia16.1¢$4.97
Wisconsin19.2¢$5.95
Wyoming14.7¢$4.54

Certified models closest in efficiency

computer monitors within reach of 31 kWh/yr
ModelkWh/yr$/yr (US avg)
DELL P2225Hbmost efficient31$5.84
EIZO FlexScan S193431$5.82
Acer B247Ymost efficient31$5.82
BenQ GW2790C-Bmost efficient31$5.82
ASUS VA24DQFmost efficient31$5.80
ASUS MB16A31$5.86

Run your own numbers

Your rate, your numbers

Per day
2¢
Per month
$0.49
Per year
$5.84

31 kWh/yr × 18.8¢/kWh = $5.84/yr

Prefilled with this model's certified 31 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 VS20870 use?
ENERGY STAR certifies the ViewSonic VS20870 at 31 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 VS20870 cost to run per month?
About $0.49 a month at the U.S. average residential rate (18.8¢/kWh) — 2¢ a day, or $5.83 a year. Your state's rate moves this up or down; see the table above.
Is the ViewSonic VS20870 energy efficient?
It uses 31% less electricity than the median certified computer monitor, placing it in the top 10% of certified models. It also meets ENERGY STAR's Most Efficient criteria.
What does the ViewSonic VS20870 cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $3.82 a year in North Dakota (12.3¢/kWh) and $14 in Hawaii (46.6¢/kWh).

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