How Many Watts Does a Laptop Use Easy Guide

There are some factors that most laptop users appear to be unconcerned with or that aren’t worth worrying about. However, we can assist you if you are a curious person who has been trying to figure out everything about the machine you have been using for years or want to figure out the energy consumption of the one you are considering purchasing. For example, would you like to know How Many Watts Does a Laptop Use?

If you’re only curious about the numbers, the answer is straightforward: an average 15-inch laptop consumes roughly 60 watts per hour. However, this isn’t the precise amount of food it would ingest. Numerous elements influence energy use that you may not be aware of. For example, charging, screen brightness, active applications, graphics card utilization, and other factors can influence power consumption.

How Many Watts Does a Laptop Use?

Now, we will talk about How Many Watts Does a Laptop Use?

Without the hardware above, a laptop will not function. However, each brand and model will have a unique set of specs.

The simplest way to determine the approximate wattage consumption of a laptop is to look at its adapter. The adaptor will indicate the maximum power input that your computer can accept. However, you may obtain a more precise estimate of its power use with some work.

Examine the Components

You can find the specs for the components in your laptop on their websites. However, combining these values will not provide you with the precise wattage or power usage of your computer. However, entering the values into an online power consumption calculator will reveal the exact amount of power consumed by your laptop.

Electricity Consumption Monitor

The most straightforward approach to deciding the wattage of your laptop is to utilize a power usage monitor. Connect your computer to one of these devices to obtain a real-time estimate of the number of watts consumed by your laptop and determine its power usage.

Frequently Consume Laptop Battery Components

Apart from machine time, various factors influence the amount of power a laptop consumes. However, the following are the primary ingredients:

Screen Size

The screen size is a crucial component in determining the amount of energy consumed by a computer. A larger model will consume more power than a smaller model. For example, lines measuring 15.6 inches in length will require around 60 watts per hour. On the other hand, 13-inch models consume approximately 45 watts per hour.

Additionally, the Notebook line consumes far less power than gaming laptops due to the low setup of this product class, including the Acer predator laptop. However, if the item is frequently used at a fast rate of speed, the wattage consumed can reach 100.

The machine will overheat when the display remains on for an extended period. As a result, a cooling mechanism is required to ensure that the device operates for an ample time.

Kind of Charger

Each model will include a unique charger. The manufacturer will measure and calculate the wattage needed for the laptop to design an appropriate power charger. As a result, this product is rarely sold individually and is typically included when purchasing a new machine.

A 15.6-inch laptop, for example, will come with a 60-watt charger. The 17-inch model will require up to 90 watts of power, a typical power consumption.

Laptop wattage calculator

However, it would be beneficial if you did not use another device’s charger for your device, as the charger’s power output is insufficient. In addition, because each model has a varied wattage, it will not work with your laptop.

Increasing the Life of Your Battery

Knowing how much power your laptop consumes is valuable information, but knowing how to reduce its consumption. With a few minor modifications, you can extend the life of your battery and reduce the amount of power consumed by your laptop.

The size of its display does not just determine your laptop’s power consumption. Your screen’s brightness determines how much energy it consumes. Consult your laptop’s settings to determine how to dim the display.

Purchase a cooling pad at lower temperatures. Your laptop’s CPU and graphics card operate more efficiently and consume less battery power. Use the appropriate notebook for the job. Run it may be enticing to buy a high-end gaming laptop. However, this will be a waste of wattage and money if you use it for essay writing.

Invest in the appropriate hardware. Electricity is costly; investing in higher-quality, more efficient technology will save you money over time.

Is a Laptop More Energy Efficient Than a PC?

Energy conservation benefits both the environment and your money. Selecting the appropriate equipment might help you save money on your energy cost if your laptop is energy efficient. Laptops are created to consume less power and utilize electricity more efficiently than desktop computers. Using one of these Laptops for Cameo 3 in place of a desktop computer will help you conserve energy daily.

Energy Provision

Although desktop power supplies can produce hundreds of watts of output power, they typically consume less than 150 watts when doing modest tasks. On the other hand, a laptop typically consumes between 30 and 40 watts of power in regular operation and significantly more when charging the battery. Additionally, laptops can operate in a “low power” mode, which conserves battery life by reducing the amount of power consumed by the computer.


Desktop computers are extensible and can accommodate many more components than laptop computers. High-performance computers support multiple hard drives and multiple graphics cards. As a result, their energy consumption increases. 

The more components you add to a desktop computer, the more electricity it consumes. While notebook computers with a fixed number of members are less susceptible to alteration than desktop computers, their restricted expandability limits the quantity of power-consuming components installed.


Laptops utilize “mobile” CPUs and purpose-built processors to consume less power than desktop counterparts. Your laptop’s mobile CPUs must be energy efficient to maximize the computer’s battery life; desktop CPUs receive an uninterrupted supply of electricity. 

Mobile CPUs have a lower energy efficiency rating than typical desktop processors. Due to this limitation, applications that consume a high volume of system resources may perform slower on a laptop.

FAQs – How Many Watts Does a Laptop Use?

How Many Watts Does an Apple Laptop Use?

The Macbook has a 65-watt adapter, while the Macbook Pro has an 85-watt adapter. I can use both of the adaptors with no issues on both Macbooks. In a nutshell, I can use a 65-watt adapter with my Macbook Pro flawlessly. Anyway, Apple does not provide an 85-watt adapter for no reason, so I believe it is preferable to use 85 watts rather than 65 watts.

What is 15W fast charging?

At its most fundamental level, rapid charging increases the amount of wattage (W) given to a phone’s battery. A standard USB port transmits 2.5W to the connected device; faster chargers transmit at a higher rate. Current-generation devices often ship with 15W power bricks.

Should I Use Laptop Plugged in or on Battery?

Although, if you want most people, you likely keep yours plugged in at work or home. So put an end to that. Instead, to acquire the most life out of your lithium-polymer battery, unplug your laptop after it reaches 100 percent. Indeed, it would help if you disconnected it first.

Why Is My Battery Draining So Fast?

If you’re like most people, you likely retain yours plugged in at work or home. So put an end to that. Instead, get the most life out of your lithium-polymer battery. Unplug your laptop after it reaches 100 percent. Indeed, it would help if you disconnected it first.


Now, you know all about How Many Watts Does a Laptop Use? It is critical to monitor the wattage consumption of the equipment. Then, after each battery is fully charged, you can adjust your laptop’s charging duration and usage time. 

We hope that the preceding post has assisted you in determining how much power your laptop requires each hour and choosing the most effective way to conserve battery life.

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