How much does a computer monitor cost to run in Tennessee?
$5.14 a month
- A day of use
- $0.17
- An hour of running
- $0.02
- A year
- $61.63
150 W, 8 hours a day, at Tennessee’s average rate of 14.1¢ 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 | $0.64 | $7.70 |
| 2 hours a day | $0.04 | $1.28 | $15.41 |
| 4 hours a day | $0.08 | $2.57 | $30.81 |
| 8 hours a day typical | $0.17 | $5.14 | $61.63 |
| 24 hours a day | $0.51 | $15.41 | $184.88 |
A typical model draws about 150 W (Virginia Cooperative Extension).
Tennessee compared with other states
Tennessee’s residential rate is the 5th cheapest of 51 states and DC, 4.3¢ below the US average of 18.3¢ (−23%). Tennessee’s rate is up 0.3¢ from June 2025 (13.8¢, +1.8%).
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 Tennessee. A computer monitor at 150 W uses 0.150 kWh per hour, and at Tennessee’s average of 14.1¢ per kWh that comes to $0.02.
How much does a computer monitor add to your electric bill?
Used 8 hours a day, about $5.14 a month in Tennessee, or $61.63 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 $0.51 a day, or $15.41 over an average month in Tennessee.
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 Tennessee than elsewhere?
Tennessee’s residential rate is the 5th cheapest of 51 states and DC, 4.3¢ below the US average of 18.3¢ (−23%). Tennessee’s rate is up 0.3¢ from June 2025 (13.8¢, +1.8%). 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.