How many watts to charge a laptop? [Detailed Guide]

How many watts to charge a laptop

How many watts to charge a laptop?

How many watts to charge a laptop? In this modern age, you need a laptop to perform tasks such as crafting and writing. Laptops are indispensable, whether at home or in the office. Technology has become a part of our lives, and we feel incomplete without it.
No matter what your profession is, laptops are an indispensable tool for you. Most importantly, you need to manage your laptop and know everything about it properly. Find a comfortable chair, sit tight, and discuss this topic. We have thoroughly examined the question of “How many watts to charge a laptop.”
Most laptop users worry about their devices. Others don’t worry about some factors they don’t understand or are not worth understanding. If you plan to buy a laptop or use it for several years, you should read this article.
What Are Watts?
The term “watt” refers to the amount of power required for a device, and watts refer to the required wattage. If the laptop needs more watts to power itself, its battery will drain faster.
Laptops come in various manufacturers and models, and we all use them for various purposes. This will change the wattage. There are no round numbers. Generally speaking, most laptops require around 20-100 watts per hour. However, those that require more energy may require 180 watts per hour or more.
When using a laptop for games, video editing, or other intensive tasks, the device uses more watts as it needs more energy to power itself. Several factors affect the wattage used by laptops.

How many watts to charge a laptop?

60 to 90 Watts per Hour
We become more and more dependent on technology as it evolves. Technology has quietly settled into our daily lives, so we cannot imagine living without it. There are few hi-tech devices in this modern era. But laptops are one of the essential items we find unreliable.

Factors affecting laptop charging:

The factors which play an essential part regarding the watts consumption when the laptops are being charged are as under;
Laptop Adapter: The simple basic answer to this question is that the amount of wattage a laptop consumes while charging can be determined by the charger it has. Laptops with various-inch screens have adapters that charge accordingly.
Like other 15-inch laptops, it uses a 65-watt charger, and a 17-inch laptop uses 90 watts.
Generally, these two types of adapters are coming to the market recently, and laptops charge and consume watts according to the adapter.
If the power supply is uninterrupted or the adapter is working correctly, it’s safe to assume that the laptop can consume 60-90 WH.
CPU: The CPU is the heart of any computer or laptop business machine. The CPU is responsible for running the operating system and any applications it uses.
Regardless of the version of Windows, there are many programs available to improve CPU performance. However, using a faster CPU will shorten battery life. This is because the CPU uses too much energy to work to a level that drains the battery.
The adapter provides energy in watts, so the battery takes them and provides that energy for the laptop work correctly. The extra load on the CPU means an additional load on the battery.
However, the wattage remains the same, so your laptop battery life is getting shorter day by day.
Not to mention the load on the adapter. But that’s why it’s called an adapter. This will help you overcome these wattage situations.
Dual graphics card: Not everyone uses what they use, but anyone who knows how software and its heavy use can drain the battery.
These graphics cards improve screen resolution and sharpness and are also heavy software supporters. It also helps you get specific software up and running.
Watt consumption during charging is affected by the graphics card. You have to strain the battery to get more energy, and the adapter has to work harder.
In this case, voltage is created between the battery and the adapter. As a result, the adapter and battery overheat, shortening the laptop’s life.
Other parts of the laptop in use: Other parts include screens, loud music, excessive use of the internet, and downloads. All this puts undue stress on the battery, laptop, and of course, the charger.
Laptops are typically used while charging and therefore affect charging. This has a detrimental effect on your laptop’s health.
Turn off your laptop before finding it if you want to know the exact wattage your laptop consumes while charging. At this point, there is no pressure or load on the laptop other than the charge itself.
Many devices can easily measure things like the wattage of a laptop. All you have to do is connect the plug-in energy and power monitor to the device and record the readings.

How many watts to charge a MacBook Pro?

How many watts to charge a MacBook Pro
In this case, an 87-watt MacBook Pro charger can provide 20.2 volts at 4.3 amps (87 watts), 9 volts at 3 amps (27 watts), or 5.2 volts at 2.4 amps (12.5 watts). In other words, you need to multiply the current by the voltage to get the total power output of the charger.

What is the battery life of a car for a laptop?

Average car battery capacity exceeds 50 amp-hours or 600 watt-hours. A standard laptop (*60W) can be powered for over 10 hours without the engine running and still start the vehicle.
For proper battery charging, it is recommended to run the engine for 30 minutes every 3-4 hours. The car alternator doesn’t generate much power at idle (~300W), but it’s enough to extend the battery backup for a few more hours.

What is the difference in laptop wattage between Acer, Dell, ASUS, HP, etc.?

The laptop brand doesn’t matter. Watts usage rules, HP, Lenovo, DELL, ASUS, Acer, MSI, Razer Blade, etc. Do not differ based on brand. If your laptop has high specs and a high GPU, it will consume more. However, if both brands use laptops with similar specifications, there is no significant difference in watts.

Can I use a high-watt charger for my laptop?

The simple answer is “yes.” You can use a higher wattage laptop charger, but there are some caveats. The wattage of the laptop charger is the maximum rating. This means the charger can supply any power up to or during its output wattage.

How to keep your battery charged longer?

The power consumption of your laptop is important to know, but it’s also important to reduce that amount.
By reducing your power consumption, you can extend the life of your battery, so you don’t have to replace the battery after a while. There are several ways to reduce the wattage of your laptop.
Decrease the brightness. Besides screen size, laptops use more energy to provide brighter images. Check your laptop settings and lower the brightness.
Some high-end laptops also have an energy-saving brightness feature. After a specific time, the brightness automatically decreases.
Invest in cooling pads. The cooling pad comes with a fan to prevent the laptop from overheating. CPUs and graphics cards work better at low temperatures. This consumes less energy from the battery and saves power.
Use the right laptop for your needs. It’s easy to imagine you’ll need a modern gaming laptop, but if you’re clicking on a spreadsheet, it’s not the best choice. For enhancing your experience of gaming laptop you can visit our guide on 8 Best gaming laptops under $750.

How much power does your laptop use?

How much power does your laptop use
50 watts = 0.05 kWh, 8 hours per day = 5p per day
Tips for saving electricity!

  • When not in use, turn off your appliances completely – don’t leave them on standby.
  • Use your laptop only as much as you need.
  • Replace desktop computers with laptops.
  • If you are not using the loudspeakers, turn them off.
  • Turn the printer off when it’s not in use.
  • When you aren’t working on your computer, turn off the screen.
  • Laptops are preferable to desktops.



If you think that by plugging your phone's charger in all day, your electricity bill has gone up, think again. "Mobile phone chargers only use electricity while charging. So leaving it tied to the wall makes no difference.

Laptops typically use around 50 watts of power. This is equivalent to 0.05kWh. This means that if your laptop is on for 8 hours a day, it will take 5p a day to run your laptop (based on the average energy unit cost of 12.5 p/kWh).


In conclusion, let’s look at the summary of what we talked about laptop power consumption. Laptops typically consume 60W while charging but are heavily dependent on a combination of other components during use.
It’s better to use some devices to know the power your laptop is using instead of going for the manual process. The process involved may or may not yield accurate results, confusing. If you need an idea, you can waste your time and brain. However, if you want good results for your purpose, use the Electricity Usage Monitor to get accurate results.
Otherwise, always let us know how much electricity does a laptop use or how many watts does it take to charge a laptop. Don’t hesitate to visit mrlatopexpert for more such type of information and buying guides regarding laptops.