Whether you work from home or simply enjoy scrolling the web, there’s no doubt that your computer contributes to your household’s electricity usage. Luckily, most computers consume far less energy than major appliances like HVAC systems or dryers.
In this article, we’ll share more about how much electricity your computer uses to help you estimate costs and identify opportunities to save energy.
Computer Electricity Use at a Glance
Computer energy usage varies depending on the specific type of device and components you have, as well as how you use your system. This table breaks down the typical wattage of different types of computers.
| Computer Type | Average Wattage |
| Chromebook | 15-45 watts |
| Standard Laptop | 30-70 watts |
| Business Laptop | 45-90 watts |
| Desktop Computer | 100-300 watts |
| Gaming Desktop Computer | 300-800+ watts |
| Workstation Computer | 400-1000+ watts |
Gaming PCs, video editing terminals, and workstation computers typically run more demanding software, resulting in higher energy consumption than laptops or basic desktops.
Watts vs. Kilowatt-Hours
Keep in mind that computers are rated in watts, which measure how much power they use at a given moment, while your electric bill is measured in kilowatt-hours (kWh), which measures energy usage over time. You can use this formula to convert one to the other:
Watts ÷ 1,000 × Hours Used = kWh Consumed
For example:
100 watts ÷ 1,000 × 8 hours = 0.8 kWh
This calculation can help you determine how much individual devices contribute to your electric bill each month.
How Many kWh Does a Computer Use Per Month?
The amount of electricity a computer uses each month depends on how many hours it runs each day. Using the calculations above, here’s how much power different types of computers consume running 8 hours per day for 30 days:
| Device | Daily Usage | Monthly Usage |
| 50W Laptop | 0.4 kWh | 12 kWh |
| 150W Desktop | 1.2 kWh | 36 kWh |
| 400W Gaming PC | 3.2 kWh | 96 kWh |
The average residential electricity rate in the U.S. is currently about 17 cents per kWh, resulting in typical monthly operating costs of:
Laptop: 12 kWh x $0.17 = ~$2
Desktop: 36 kWh x $0.17 = ~$6
Gaming PC: 96 kWh x $0.17 = ~$16
What Affects How Much Energy Your Computer Uses?
Several other factors influence how much electricity your computer uses.
- Device Type: Laptops are generally designed to be energy efficient and typically use far less electricity than desktop computers.
- Usage Habits: A computer used for email and web browsing consumes less energy than one used for gaming, video editing, 3D rendering, or other intensive tasks.
- Screen Size and Brightness: Larger monitors require more power to operate. Higher brightness settings also increase electricity consumption.
- Number of Displays: Using multiple monitors can significantly increase overall energy usage, especially for larger screens.
- Computer Components: Powerful graphics cards, processors, and cooling systems typically consume more electricity than standard hardware.
- Sleep and Power Settings: Computers left running continuously will use more electricity than systems configured to enter sleep mode during inactivity.
Tips to Reduce Computer Energy Use
Though computers are relatively efficient, small changes in behavior can still help lower your electricity usage.
- Use Sleep Mode: Configure your computer to automatically enter sleep mode after periods of inactivity.
- Lower Screen Brightness: Reducing brightness can noticeably decrease power consumption, especially on laptops.
- Turn Off Monitors When Not in Use: Monitors continue consuming electricity even when you’re away from your desk.
- Unplug Unused Accessories: Printers, speakers, external hard drives, and chargers can continue drawing power, even in standby mode.
- Upgrade Older Equipment: Newer computers are often more efficient than aging systems.
- Use a Laptop When Possible: Laptops typically consume far less electricity than desktop computers performing similar tasks.
- Shut Down Overnight: If you don’t need remote access or overnight updates, powering down can eliminate unnecessary energy usage.
Keep Your Home Powered With Agway®
Understanding how much electricity your computer uses can help you manage household energy costs. Though computers are generally efficient, being aware of how your usage affects consumption can help you make more informed energy decisions.
Beyond energy supply, many homeowners need value-added protection for the systems they rely on every day. Agway Energy Services® offers access to programs like Agway EnergyGuard®, which helps cover eligible repairs caused by normal wear and tear on qualifying heating, cooling, and electrical systems*.
Contact Agway to learn more about available plans and protection options designed to help keep your home comfortable and running smoothly throughout the year.
Computer Electricity FAQs
How much more electricity does my computer use working from home?
The amount of electricity you use working from home depends on your equipment and schedule. A standard laptop used 8 hours per day may only add a few dollars per month to your electric bill, while multiple monitors, printers, and other office equipment can increase costs.
Does leaving a computer on overnight waste electricity?
Yes, leaving a computer on overnight uses more electricity than placing it in sleep mode or shutting it down. Though the cost is typically not high, it can add up over time, especially for desktop or gaming systems.
How do I calculate what my computer costs on my electric bill?
To calculate how much your computer costs on your electric bill, multiply the computer’s wattage by the number of hours used, and divide by 1,000 to get your kWh. Then, multiply by your electricity rate.
Do gaming computers use significantly more electricity than regular computers?
Yes, gaming computers typically use significantly more energy than regular computers. Gaming PCs often include high-performance graphics cards and processors that consume several times more electricity than a standard laptop or desktop.
Do computer monitors use a lot of electricity?
No, computer monitors don’t typically use a lot of energy. Most modern LED monitors are relatively efficient, typically using between 20 and 100 watts depending on size and brightness settings. Larger displays and multi-monitor setups naturally result in more energy consumption.
*Coverage depends on commodity purchased.
