How much does a laptop cost to run in Rhode Island?
$3.56 a month
- A day of use
- $0.12
- An hour of running
- $0.01
- A year
- $42.68
50 W, 8 hours a day while plugged in, at Rhode Island’s average rate of 29.2¢ 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 | $0.01 | $0.44 | $5.33 |
| 2 hours a day | $0.03 | $0.89 | $10.67 |
| 4 hours a day | $0.06 | $1.78 | $21.34 |
| 8 hours a day typical | $0.12 | $3.56 | $42.68 |
| 24 hours a day | $0.35 | $10.67 | $128.03 |
A typical model draws about 50 W (Virginia Cooperative Extension).
Rhode Island compared with other states
Rhode Island’s residential rate is the 6th most expensive of 51 states and DC, 10.9¢ above the US average of 18.3¢ (+59%). Rhode Island’s rate is up 2.4¢ from June 2025 (26.8¢, +8.9%).
Ways to spend less
- Turn down screen brightness; the display is one of the largest loads.
- Unplug the charger once the battery is full if you are not using it.
- Use the battery-saver power mode.
Questions
How much does it cost to run a laptop per hour?
About $0.01 an hour in Rhode Island. A laptop at 50 W uses 0.050 kWh per hour, and at Rhode Island’s average of 29.2¢ per kWh that comes to $0.01.
How much does a laptop add to your electric bill?
Used 8 hours a day while plugged in, about $3.56 a month in Rhode Island, or $42.68 a year.
How much does it cost to run a laptop 24 hours a day?
Running nonstop, a laptop would use 1.20 kWh a day and cost $0.35 a day, or $10.67 over an average month in Rhode Island.
How many watts does a laptop use?
A typical model draws about 50 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 laptop cost more or less to run in Rhode Island than elsewhere?
Rhode Island’s residential rate is the 6th most expensive of 51 states and DC, 10.9¢ above the US average of 18.3¢ (+59%). Rhode Island’s rate is up 2.4¢ from June 2025 (26.8¢, +8.9%). 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.