How much does a computer monitor cost to run in Iowa?
$5.81 a month
- A day of use
- $0.19
- An hour of running
- $0.02
- A year
- $69.77
150 W, 8 hours a day, at Iowa’s average rate of 15.9¢ per kWh (EIA, June 2026). How we calculate this
Change the watts, hours or rate
What it costs at other usage levels
| Use | A day | A month | A year |
|---|---|---|---|
| 1 hour a day | $0.02 | $0.73 | $8.72 |
| 2 hours a day | $0.05 | $1.45 | $17.44 |
| 4 hours a day | $0.10 | $2.91 | $34.89 |
| 8 hours a day typical | $0.19 | $5.81 | $69.77 |
| 24 hours a day | $0.57 | $17.44 | $209.32 |
A typical model draws about 150 W (Virginia Cooperative Extension).
Iowa compared with other states
Iowa’s residential rate is the 23rd cheapest of 51 states and DC, 2.4¢ below the US average of 18.3¢ (−13%). Iowa’s rate is up 0.6¢ from June 2025 (15.3¢, +3.9%).
Ways to spend less
- Lower the brightness; it is the main driver of a monitor's power use.
- Let it sleep after a few minutes idle.
- Switch it off at the button at night rather than leaving it on standby.
Questions
How much does it cost to run a computer monitor per hour?
About $0.02 an hour in Iowa. A computer monitor at 150 W uses 0.150 kWh per hour, and at Iowa’s average of 15.9¢ per kWh that comes to $0.02.
How much does a computer monitor add to your electric bill?
Used 8 hours a day, about $5.81 a month in Iowa, or $69.77 a year.
How much does it cost to run a computer monitor 24 hours a day?
Running nonstop, a computer monitor would use 3.60 kWh a day and cost $0.57 a day, or $17.44 over an average month in Iowa.
How many watts does a computer monitor use?
A typical model draws about 150 W (Virginia Cooperative Extension). Check the label on yours: cost scales directly with watts, so a 20% lower wattage means a 20% lower bill.
Why does a computer monitor cost more or less to run in Iowa than elsewhere?
Iowa’s residential rate is the 23rd cheapest of 51 states and DC, 2.4¢ below the US average of 18.3¢ (−13%). Iowa’s rate is up 0.6¢ from June 2025 (15.3¢, +3.9%). The appliance uses the same energy everywhere; only the price per kWh changes.
Sources
- Virginia Cooperative Extension: Estimating appliance and home electronic energy use (reproduces U.S. Department of Energy sample wattages)
- Penn State EGEE 102: Typical range of power consumption (wattage)
- U.S. Energy Information Administration, Electric Power Monthly, Table 5.6.A: average price of electricity to ultimate customers, residential, June 2026 Figures transcribed from republications of this table on September 26, 2026; pending direct verification from the EIA API.
- Carrier page: June 2026 residential average price, citing EIA Electric Power Monthly Table 5.6.A
Usage assumptions (hours a day, season) are ours and listed on the methodology page. Found an error? Tell us.