How many watts does a laptop consume?

There are some factors that most laptop users don’t seem to care about or need to worry about. Well if you are a curious person trying to figure everything out about the machine you have been using for years or want to know the power consumption of the one you are planning to acquire then we will help you.

If you stick with numbers, the answer is very simple, a typical 15-inch laptop uses around 60 watts per hour. But that’s not the exact amount she would consume. Energy consumption depends on tons of factors that you might not be aware of. Loading, screen brightness, software operation, use of graphics cards, etc. are all factors that can affect the power consumption of a laptop computer.

How many watts does a laptop consume: The Factors

Before discussing the factors on which it depends, you may want to consider several things. There are tons of brands that make laptops every year. As we move towards better use of technology, companies have tried to build the best machine using the least amount of power while still performing as well as any laptop you have used.

How many watts does a laptop consume
How many watts does a laptop consume

Thus, the type of laptop you own will determine the overall power consumption. The more external equipment you connect, the more power it consumes. Let’s take a look at the factors on which energy consumption depends.

1. Laptop type [Gaming Laptops & Workstations Consume Higher Power]

One of the main factors that determine power consumption is the type of laptop you are using. If you are using a very simple and general laptop, it will consume about 60 watts/hour; if it is a gaming laptop or any other high-end laptop, it will consume much more than that. Based on testing in our labs, some models can consume an average of well over 100 watts per hour, which is why the laptop gets very hot and needs an ice pack to cool it down.

Likewise, if you charge these laptops, the bill goes up even more.

2. CPU

It is practically understood that a laptop with a very low-quality processor or processor uses higher power loads than any powerful processor such as Intel i7 or Intel i9. The reason is as simple as it sounds. The processor that might not be performing well enough will need more power to provide your laptop with sufficient performance, whereas a good processor performs very well with a small amount of power it consumes.

3. Graphics card

THE HIGHER the performance of a graphics card, the HIGHER the power consumption. For example, when playing a high-end game, your laptop’s GPU will give you better images. Most gaming laptops and workstations intended for tasks such as machine learning usually come with a high-end GPU.

A laptop with a high-end GPU comes with a high-end CPU as well. In most cases, it also has better screen quality, higher battery capacity, etc. Therefore, altogether, they would consume higher power. We devoted a section of this post to the power consumption of gaming laptops.

If you buy a 2 in 1 laptop or a budget model with integrated graphics, it will consume fewer watts!

4. Adapter power

  • Most 15.6 inch laptops come with a 60W charging adapter.
  • Most 17-inch laptops come with a 90W charging adapter.
  • If your laptop has a 60W adapter, it will consume less than a laptop with a 90W adapter, because that’s the number of watts it will consume while in use.

How many watts does a laptop use to play?

We have another important category of laptops that deserves special mention because everything about laptops games is powerful and requires a special assembly of components. As a gamer, you can understand that in order to run some high-end games, the laptop has to be at its best.

Plus, almost all gaming laptops are heavy and bulky since they’ve been equipped with the best of everything. From processor to the powerful battery, gaming laptops have it all.

To check the power consumption of a gaming laptop, you can check the charger it is charged with. One of the most popular gaming laptops, the Acer Predator Helios 300, which we have mentioned in almost every laptop series as one of the best laptops, has a charger with a power of 180 W. This means that it consumes at least 180 watts per hour.

Read also: Apple MacBook Pro Vs MacBook Air?

How many watts does an Apple MacBook consume?

If you are a Macbook user, you should know that a typical 13-inch Macbook Pro draws 61 watts as indicated in the charger while that of a 15-inch Macbook draws 87 watts/hr.

Based on the above assumptions, you can easily calculate the cost of the electricity you can consume each day and for a week. Since a Macbook consumes an average of 61 Watt/hr, or 0.061 kWh, and runs about 10 hours per day, it will cost about 7.32 cents, or a total of 51.24 cents in about a week (taking 12 cents / kWh of electricity cost ).

How to use less power on your laptop

If you have already figured out how much power your laptop is using and are very unhappy with the results, you might need to think about ways to use less power. We have tested some methods for our laptops and you can try them too.

  • Be sure to unplug the plug from the laptop when it is fully charged.
  • Never overload your laptop, it weakens the battery and consumes more power in the process.
  • Plugin the charger when the charge reaches 10%. Don’t wait for it to go out. This process takes extra effort to charge, drain the battery, and consume more power.
  • Buy an ice pack to keep the laptop cool while charging.
  • To control consumption, allow the laptop to cool down before restarting your work.
  • Update your processor and other hardware to avoid strain on the system.
  • Always use the original charger provided by the company.

There are lots of other things you can try for energy use. Having a very bright screen consumes a lot of energy. You can avoid this by lowering the screen brightness when you don’t need it and this will also protect your eyes.

Read also: How to Measure Laptop Size?

How to calculate the watts consumed by a laptop?

Ultimately, it comes down to understanding some methods of calculating the watts actually used by your laptop. Either you can roughly determine it by knowing the power consumption of your laptop charger as well as other factors. Or you just use an electricity consumption monitor to find out how much power your laptop is consuming.

1. Manual calculation

In each laptop, you can easily determine the approximate level of power your laptop consumes by considering the power used to charge it (adapter wattage.) If you need a more precise figure, you will need to maybe take other things into account.

As we said for the Acer Predator laptop, comes equipped with a charging adapter that consumes 180 watts per hour. Apart from that, some of the main components which tend to increase the overall consumption are the CPU and GPU of the machine.

In most systems, you will easily find an Intel processor and an NVIDIA or even AMD graphics card. You can either search the official website for the power consumption of these components or open the back panel and take a look yourself, to be 100% sure.

Typically, the power consumption of a CPU is around 45-50W, while that of a GPU is 75-80W. Overall, these two factors combined increase the power consumption of laptop energy over 10-15%, which is only an average and can go much further depending on the type of components used.

In addition, if we talk about the brightness of the screen, it goes from 0.5W to 15W per hour with maximum brightness. These are some of the components taken into consideration while there are others as well such as SSD / HDD, RAM., etc. It is not always possible to obtain the exact figure manually, but one can know an approximate value for a basic idea.

In addition, as we know, it consumes around 60 watts of electricity, which is the equivalent of 0.06 kWh. This means that if a laptop is turned on for about eight hours a day, it will cost 6.76 cents a day to run it (considering an average unit energy cost of 12 cents / kWh).

Read also: How do I capitalize e on a laptop and a Mac?

2. Use of electricity: The calculation

For a more accurate calculation, you can use an electricity consumption monitor. This device can be used from the power outlet and tells you exactly what watts your laptop has used while charging. It includes everything since all the electricity consumed comes from a single outlet and the result is displayed on the monitor in seconds.

In fact, you can use the device for other devices in your home as well. It may not be necessary, but curiosity makes you do things unimaginable.

To use it, simply stick the device on the wall outlet and plug the charger into the device. It will start to read the amount of current that your charger is drawing from the outlet. Typically, it will show around 60W, which is how much power the charger was designed with.

Also, once the laptop is charged and the battery is full. You can now determine how much power the laptop is drawing from the battery to its components. This device is also useful for calculating the total power consumed by the laptop during the period you used.

You can easily get this useful device from eCommerce sites and use it to learn more about your laptop and other devices.

How many watts does a laptop consume – FAQ’s

Does a laptop use less power than a PC?

There is no doubt that a laptop consumes less power than a PC since it has many components. In fact, there are many types of laptops that use more power than any basic laptop. So let's see how many watts a laptop consumes and what factors depend on it. Is the power of laptops different in different brands, such as Acer, Dell, ASUS, HP, etc. It doesn't matter what brand of your laptop, whether it is from HP, Lenovo, DELL, ASUS, Acer, MSI, Razer Blade, etc. the rules for using a watt remain the same. If the laptop has high specifications, high GPU, then the consumption will be high. However, if two brands have a laptop with similar specs, the wattage won't be much different.

Gaming Laptop Power Versus Base Laptop Power: What's More?

Obviously, the power of gaming laptops is greater than that of the basic low-end device. This is because it has better screen quality, higher graphics, high adaptation power, powerful processor, etc.

How many watts does a 15.6-inch laptop consume?

We tested the specs of around 237 models and found that on average, most 15.6-inch laptops draw around 60 watts of power.

The power of laptops in 17-inch machines?

We tested the specs of about 171 different 17-inch models and found that on average most laptops consume 90 watts!


To wrap up, let’s do a quick summary of what we discussed about laptop power consumption. A laptop, when charged, typically consumes 60W while when in use it is much more dependent on other components taken together.

It is better to use some device to find out the watts used by your laptops rather than doing it manually. The process in question may or may not give you a definite result and may leave you confused. If you just need an idea, you can use your time and your brain. But if you need the correct results for a real purpose, be sure to use the Electricity Usage Monitor for accurate results.

If not, you can always tell us how much power your laptop is using and how you can save power.

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