How Many Watts Does a Laptop Charger Use

Do you ever wonder how many watts your laptop charger uses? It’s a valid question, especially if you want to save on your electricity bill. In this blog post, we will answer that question and give you some tips on factors that will affect a laptop’s power consumption and some advice on fast charging. Keep reading to learn more!

How Many Watts Does a Laptop Charger Use?

A standard laptop charger consumes 65 watts. However, this number can vary depending on the make and model of your laptop. Some newer laptops have chargers that use less energy, while older models may use more.

How to Find Out What Your Laptop Charger Use

To find out how many watts your laptop charger uses, look at the label on the charger itself. The wattage will be listed there. Look for the number before the “W” symbol. You can also consult your laptop’s user manual to find this information.

How Much Power Does A Laptop Use Over a Year?

Assuming that you use your laptop for an average of three hours per day and it is plugged in for two of those hours with a 65W charger, your laptop will consume approximately 47.5 KWh over a year. This means that if you are paying $0.11 per kWh, it will cost you $5.22 to power your laptop for one year.

What Factors Affect A Laptop’s Power Consumption?

How much power your laptop uses depends on a number of factors, including:

Usage: How you use your laptop will have the biggest impact on how much power it consumes. For example, if you often have multiple programs open at once or use resource-intensive applications, your laptop will use more power than if you mostly use it for browsing the internet or working on documents.

The screen of the laptop: Another major factor in your laptop’s overall power consumption is the laptop’s screen. A screen with a higher resolution will need to display more pixels, which uses more power. The power consumption is also affected by how bright the screen is set – the brighter the screen, the more power it will consume. A larger screen will also draw more power than a smaller screen.

External peripherals: If you often use external devices such as a mouse or USB drive, your laptop will use more power than if you don’t. A good way to save battery power is only to connect these devices when you need them.

The laptop’s hardware: The processor, graphics card, and other hardware components inside your laptop will also affect how much power it uses. A processor with a higher clock speed will generally use more power than one with a lower clock speed. Likewise, gamers need to keep in mind that a powerful graphics card will consume a lot more power than the GPU you find in a standard multimedia laptop. That’s why gaming laptop chargers tend to have a higher wattage than chargers for other types of notebooks, such as Chromebooks for students.

Can I Use a 90-Watt Charger On a 65-Watt Laptop?

Yes, you can use a 90-watt charger on a 65-watt laptop. However, the extra power will go to waste as your laptop will only charge at its maximum rate, which is 65 watts in this case.

Can I Use 65W Charger On a 45W Laptop?

Yes, you can use a 65W charger on a 45W laptop. It won’t charge any faster, but it is perfectly safe to do so.

Do Laptops Use More Power When They Are Plugged In?

No, laptops do not use more power when they are plugged in. In fact, they will use less power as they will be able to draw energy from the charger itself.

Is There a Minimum Wattage Required To Charge a Laptop?

Generally speaking, a laptop charger needs to have a wattage of at least 29-31W to give the laptop more power than it would draw from the battery while in use. However, some gaming laptops require more power than this, with some needing as much as 150-200W.

Is Fast Charging Worth It?

Yes, fast charging will shorten the amount of time your laptop spends charging, but it will not have any significant impact on the lifespan of your battery.

Just be aware that fast charging will generate more heat, so only fast-charge your laptop when you can keep an eye on it. Yes, you can leave your laptop plugged in overnight, but it is not recommended with a fast charger.


Now you know how many watts your laptop charger uses and whether or not fast charging is worth it. Be sure to take care of your battery by not letting it drain all the way and by not exposing it to extreme temperatures. With proper care, your laptop battery can last for years. Thanks for reading!