How Much Energy Does a Computer Use Per Day?

How much energy does a computer use per day? On average, a desktop computer uses between 50 and 200 watts of power. However, if you’re running demanding applications, your PC could be using up to 400 watts.

Laptops are more efficient, typically only using 15 to 30 watts in standby mode. But even when they’re not in use, computers still consume electricity thanks to things like LED lights and fans.

Let’s find out how much energy does a computer use per day and how you can lower your commercial energy bill.

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How Much Energy Does a Computer Use Per Day?

Computers are an essential part of the workplace.

But how much energy do they really consume?

We’ve all heard about the importance of saving energy to help reduce our carbon footprint and save money on our electricity bills. So let’s take a closer look at how much energy your computers are actually using.

On average, a desktop PC uses between 50-200 watts of power. However, some models can use up to 400 watts.

Even when you’re not using it, your computer is still consuming electricity in standby mode. The good news is that there are lots of ways you can reduce the amount of power your computers consume without sacrificing performance or convenience.

Here are just a few tips.

  • Use power management features: Most computers have built-in energy-saving modes that can be activated with a few clicks. For example, you can set your computer to go into standby mode after a period of inactivity or dim the screen to save power.
  • Upgrade your hardware: If your computers are more than 5 years old, it’s probably time for an upgrade. Newer models are much more energy efficient than older ones. If you’re due for an upgrade anyway, make sure to choose computers with the Energy Star label.
  • Use cloud services: More and more people are using cloud services like Google Docs and Dropbox instead of traditional desktop applications like Microsoft Word or Excel. Not only do these services use less energy (since they run on remote servers), but they’re also typically cheaper and easier to use.
Key Takeaway: You can save energy and money by using power management features on your computers, upgrading to newer, more energy-efficient models, and using cloud services.

How much power does the average computer use?

This is something that you may not have thought about before, but it’s actually quite important to know. After all, computers are one of the most common machines in the workplace and they can consume a lot of electricity when running for long periods of time.

How much power your computer uses depends on a few different factors, like whether it’s a desktop or laptop, how old it is, and what kind of tasks you’re using it for.

Knowing how much electricity your computer uses is important for two main reasons:

  1. It helps you understand your business’s carbon footprint.
  2. It allows you to make changes to reduce your energy consumption and save money on your electric bill.

If you’re interested in reducing your carbon footprint, then understanding how much power your computer consumes is a good place to start.

By making small changes – like unplugging unnecessary peripherals – you can significantly reduce the amount of electricity used by your device each day.

how much energy does a computer use per dayhow much energy does a computer use per dayhow much energy does a computer use per day


Switch to Laptops

Laptops are one of the most popular types of computers for business. They’re portable, powerful, and generally more affordable than desktop PCs.

But how much energy do they really use?

On average, a laptop only uses about 15-30 watts of power. That’s just a fraction of the 400 watts that some high-end desktop PCs can consume!

Even in standby mode, laptops still draw electricity – though it’s usually less than 1 watt.

So why is there such a big difference in power consumption?

It all has to do with size and efficiency. Laptops are smaller than desktops, which means they have less room for inefficient components. Plus, advances in technology have made laptops more energy-efficient over time.

If you’re looking to save on your energy bill, it’s clear that laptops are the way to go.

But don’t forget – even small changes can make a big difference. For example, making sure your laptop is properly ventilated can help prolong its lifespan and prevent it from overheating (which consumes more power).

And when you’re not using it, be sure to unplug your laptop – every little bit helps!

Key Takeaway: Laptops use much less power than desktop computers, on average only 15-30 watts.

Standby Mode Still Consumes Electricity

When you turn off your computers but leave them plugged into the outlet, they’re still in standby mode. So even though they are not actively doing anything, standby mode uses a small amount of electricity.

If you’re worried about saving energy and reducing your carbon footprint, make sure your employees unplug their computers or turn off the power strip at the end of each workday to help reduce your power bill.

Key Takeaway: Even when in standby mode, computers still use a small amount of electricity. To save energy and money, unplug your computer or use a power strip with a switch.

FAQs About How Much Energy Does a Computer Use Per Day

How much electricity does a computer use in 24 hours?

A laptop uses about 30 to 70 watts per hour, while a desktop PC can use between 200 and 500.

8 hours of daily use will cost about 12.2 kWh/month and 146 kWh/year.

How much electricity does a computer use per hour?

A laptop’s power consumption can range anywhere from 15 to 60 Watts while a desktop usually consumes between 60 and 250. To find the exact number of your laptop or desktop, just search for its wattage on Google.

How much does it cost to run a PC all day UK?

An energy-efficient computer with an 80+ bronze PSU consumes 730 watts (or 0.73 kilowatt-hours). At current power rates in the UK, this costs about 0.25 pounds an hour. Over 24 hours, this amounts to about 5.96 pounds.


In conclusion, it’s important to be aware of how much energy does a computer use per day, week and month. On average, a desktop uses between 50 and 200 watts of power, but this can increase to 400 watts if you’re running demanding applications.

Laptops are more efficient in standby mode, typically only using 15 to 30 watts. However, even when they’re not in use, computers still consume electricity thanks to things like LED lights and fans.

If you’re looking for ways to reduce your company’s energy consumption, our team at Vitality can help. We offer a variety of services designed to help businesses save money and resources. Contact us today to learn more about how we can help your business become more sustainable!

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