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how many watts does a laptop use

When purchasing a laptop, you may ask a question: how many watts does a laptop use? To look for the answer to this question, this post is the right place you come. Here MiniTool will show you much information about the laptop wattage and now let’s see it.

If you are a curious person, you may try to know all the information about the laptop that has been used for many years or want to figure out the power consumption of the machine you plan to get.

One of the most important factors to be considered before designing a laptop or any other device is electricity consumption. If you need to take your laptop to places where you can’t plug it in or on long journeys, it is essential to have a long-lasting battery.

To know the battery life, you need to figure out this question “how many watts does a laptop use”. Today this post will help you.

Laptop Power Consumption Factors

If you are looking for a simple answer to the question “how much electricity does a laptop use”, it is hard to say since many factors impact the watts consumption, for example, laptop adapter, CPU, GPU, screen size, and laptop model.

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A laptop adapter has a great influence on laptop wattage consumption. Different laptops come with different adapters capacities. For a 15-inch laptop, it comes with a 65-watt charging adapter while a 17-inch laptop comes with a 90-watt adapter. To know how much watts a laptop charger uses, check your laptop adapter.


The laptop CPU (central processing unit) is one of the most important components and it is the brain of a machine. With it, your actions including searching, playing games, running apps, etc. can come into true.

It is an important factor for laptop power consumption. If the CPU is powerful and runs properly, the laptop uses less power. But if the CPU is low-quality, the watts your laptop uses are high.

GPU – Graphics Cards

The graphics card also has a great impact on laptop wattage usage. If you are a professional player, your laptop may use a powerful video card to get better visuals. But it consumes more power.

Screen Size

The screen sizes of laptops are different and the larger the screen is, the more battery it uses. The laptops whose sizes range from 12 to 15 inches usually use around 60 watts per hour while the laptops that have a 17-inch or above screen consume 70 watts or higher on average.

Laptop Models

Another factor that decides how many watts a laptop uses is laptop models. Compared with simple laptops, gaming laptops use more power.

And the power usage of gaming laptops depends on the model. A few models can consume more than 100 watts per hour on average.

In conclusion, when asking “how much power does my laptop use”, remember to take these factors into account. You can have a general answer.

Ways to Reduce Laptop Power Usage

No matter how many watts a laptop uses, what you should do is to let the machine consume less power. And there are some tips:

  1. Never overcharge your laptop since this can consume more power in the process and weaken the battery.
  2. Use the original charger to charge your laptop.
  3. When the charge reaches 10%, plug in the charger. Don’t wait for it to turn off since the process can consume more power.
  4. Check the laptop’s status. If it is overheated, leave it alone for a while without using it.
  5. Pay attention to laptop hardware since the damaged hardware can lead to load and overheating. As a result, high wattage consumption appears.
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Final Words

How many watts does a laptop use? It is difficult to say the specific power consumption but you can have a general understanding after reading this post. We hope this post is helpful to you.

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