Cost to run a computer monitor
Electronics · typical wattage 35 W (15 W-80 W)
A computer monitor draws about 15 W-80 W (typically 35 W). Run 6 hours a day, it uses about 77 kWh/year, which costs roughly $1.19/month and $14.23/year at the US average residential rate of 18.56¢/kWh (March 2026). At a high-rate state like California (33.35¢) it costs more; at a low-rate state like Washington (14.40¢) it costs less.
Source: U.S. DOE — Estimating Appliance and Home Electronic Energy Use. Data as of June 2026.
Computer monitor at a glance
| Figure | Computer monitor |
|---|---|
| Typical running wattage | 35 W (15 W-80 W) |
| Assumed usage | 6 h/day, 365 days/yr |
| Energy used | 77 kWh per year |
| Cost per month @ 18.56¢ | $1.19 |
| Cost per year @ 18.56¢ | $14.23 |
Source: U.S. DOE — Estimating Appliance and Home Electronic Energy Use; ENERGY STAR product specifications. Data as of June 2026.
Cost at light, typical and heavy use
How the monthly and yearly cost changes with how long you run it, at the US average 18.56¢/kWh:
| Usage | Cost / month | Cost / year |
|---|---|---|
| Light use (3 h/day) | $0.58 | $7.11 |
| Typical use (6 h/day) | $1.17 | $14.23 |
| Heavy use (9 h/day) | $1.75 | $21.34 |
Cost at different state rates
The same computer monitor at typical usage, priced at a few representative state rates:
| Rate | Cost / month | Cost / year |
|---|---|---|
| US average (18.56¢) | $1.19 | $14.23 |
| Washington (14.40¢) | $0.91 | $11.04 |
| Texas (16.39¢) | $1.03 | $12.56 |
| California (33.35¢) | $2.10 | $25.56 |
Source: EIA Electric Power Monthly, Table 5.6.A (residential) (March 2026). Data as of June 2026.
Use the calculator to price it at your exact rate, or see all 51 states.
Wattage source & how to save
An LED monitor draws about 15–80 W depending on size and brightness.
Tip to cut the cost: Set a short screen-off timeout and reduce brightness.
Frequently asked questions
How much does it cost to run a computer monitor?
At the US average residential rate of 18.56¢/kWh, a computer monitor (about 15 W-80 W, typically 35 W) used 6 hours a day costs roughly $1.19 per month and $14.23 per year. Your cost depends on your exact wattage, usage and local rate. Use the calculator for an exact figure.
How many watts does a computer monitor use?
An LED monitor draws about 15–80 W depending on size and brightness.
How much electricity does a computer monitor use per year?
About 77 kWh per year at typical usage. That's 0.21 kWh per day at 6 hours of use.
How can I cut the running cost of a computer monitor?
Set a short screen-off timeout and reduce brightness.
Keep exploring
Sources & accuracy
Wattage: U.S. DOE — Estimating Appliance and Home Electronic Energy Use and ENERGY STAR-grade references (typical figures; ranges shown where relevant). Electricity rate: EIA Electric Power Monthly (March 2026). All public domain. Costs are a transparent calculation (see methodology) and are estimates only — your appliance's actual wattage, your usage and your utility rate may differ. Check the appliance label and your bill before relying on these figures.
Last updated: 2026-06-20