How Much Energy Does a Laptop Use

How Much Energy Does a Laptop Use – The average laptop uses about 3.5 watts of power, which is about the same amount as a wall outlet. A laptop uses a relatively small amount of energy when compared to other electronic devices.

However, because laptops are used often and for long periods of time, they can use a significant amount of energy over time. Laptops also tend to consume more energy when the battery is low. In general, a laptop consumes about 3 watts of power when in use.

Laptops are powered by batteries, which can be quickly drained if used for extended periods of time. Laptop batteries typically last around four hours when fully charged, but will use more energy as they get closer to depletion.

A laptop’s battery life can be significantly shortened by minimizing windows updates, turning off unused applications, closing unnecessary tabs in browsers and uninstalling applications that you don’t regularly use.

Every day, laptops use a significant amount of energy. Laptops are powered by a battery that is constantly being drained as the computer is used. To save power and extend battery life, some users turn off features they don’t use frequently.

Additionally, many laptop manufacturers have updated their machines to use less power when not active, such as suspending inactive processes or disabling automatic updates. However, even with these measures taken, one can expect to use about 3-5 watts of power when idling and up to 15 watts when using specific applications.

Introduction: how much energy does a laptop use?

Laptops are devices that require a lot of energy to function. Depending on the model, a laptop can use anywhere from 1 to 11 watts of power. This means that, on average, a laptop uses about 3% of the energy that an average household uses.

A laptop uses a variety of energy sources to run. These include a battery, the power cord, and the processor. Depending on the model, a laptop can use anywhere from 3 watt-hours to 50 watt-hours of energy in an hour.

So, depending on how much you use your laptop and how often it is plugged in, you could be using anywhere from 3 watts to 150 watts while it’s running.

A laptop uses a considerable amount of energy – so much in fact, that some have suggested that they may one day replace traditional desktops as the main computer device used at home. How much energy does a laptop use?

How to measure laptop energy use

A laptop uses a lot of energy, especially when it’s in use. Laptops typically use more than twice as much energy as a desktop computer. In fact, according to the EPA, a laptop uses about the same amount of energy as an oven turned on to its highest setting for one hour.

Laptops use a lot of energy. They need to be plugged into the wall and have a battery to work. Most laptops use about 5 watts of energy when they are turned on.

Typical laptop power consumption

A laptop uses a fair amount of energy. For example, a basic model of Dell Inspiron is estimated to use about 3.4 watts when plugged in and running on battery, according to the website Laptop Mag. A more powerful model from Apple, the MacBook Air, reportedly uses about 8 watts when running on battery.

A laptop uses a lot of energy. For example, a laptop typically uses about 10 watts of power when plugged into the wall and idle. This number can vary depending on the model and manufacturer, but it’s generally around that amount. When you’re using your laptop, it typically uses about 1 or 2 watts of power.

How much energy does a laptop use? It depends on the model, but most typically a laptop uses between 3 and 5 watts of power. That’s not a lot when you compare it to other devices in your home or office, but over time it can add up.

So if you’re thinking about buying or upgrading a laptop, be sure to consider how much energy it will use and try to account for that when making your decision.

Laptop power saving tips

Laptops are very popular devices because they are portable, easy to use, and allow users to work on the go. Laptop batteries last a while if they are not used constantly, but how much energy does a laptop use?

A laptop uses a significant amount of energy. A typical model uses around 50 watts of power when idle and up to 400 watts when in use. That’s about the same as the power used by a light bulb in a standard household.

A laptop computer uses a lot of energy. A typical laptop typically uses between 3-5 watts of energy when idle and up to 30 watts when used for normal tasks like browsing the internet or Word processing.

That’s more than some CFLs! Although laptops are designed to be lightweight and portable, they can be slowly draining your battery if you’re not careful. Follow these tips to conserve energy and prolong your laptop’s battery life:

1) Make sure your laptop is fully charged before you start using it.


How many watts does a laptop charger use?

The power consumption of your charger is completely dependent on the laptop. If your laptop power demand is 40 watts, The Charger will draw a little over 40 watts from the outlet.

If the battery isn’t full and charging, the laptop will draw even more power from the charger. When the laptop is idle and charging, the charger can consume 40-60 watts. Under considerable load on CPU/GPU, the number goes up.

Laptops are notorious for using a lot of energy. A study by The Guardian found that a MacBook Pro uses about one-third of the power of an average household lightbulb, and an Android tablet uses about one-seventh the power of a light bulb. But how much energy does a laptop actually use?

How Many Watts Does A Gaming Laptop Use?

Gaming laptop wattage ranges from 35W to 320W, and even more is some cases. The amount of watts used during non-gaming modes is typical – from as low as 0 watts in Off mode, to around 20 watts in Idle mode.

However, the amount of watts gaming laptops use during high performance mode is significantly more than typical laptops. And the amount of watts consumed will vary depending on the specs.

ASUS gaming laptops, specifically their ROG models, have a Total Graphics Power (TGP) that ranges from 35W to 150W, with 115W being the most common. And with a dynamic boost, the GPU power can reach 40W to 150W, with 130W now being the most common. Source

Also, according to, the Nvidia GeForce RTX 3080 Founders Edition has a 320W TGP. And that’s just the TGP.

Gaming laptops have a massive variety of specs and many are heavily customized. Two of the best selling gaming laptops on, the Dell G15 and the Zephyrus 15, have a power rating of 180W and 200W respectively. But, as mentioned, actual consumption differs from the power rating.

It wouldn’t be unreasonable to think that off-the-shelf gaming laptops use 2-5 times the amount of watts that a typical laptop uses. When looking at the amount of watts that laptops use over long periods of time, it’s easier to work with kWh. 1 kWh = 1,000 watts.

And you’re billed per kWh of electricity that you consume. For convenience, to help work out the cost to run laptops, let’s take a look at laptop power consumption in kWh.

Do Laptops Use A Lot Of Electricity

No. Laptops do not use a lot of electricity. They are not considered energy guzzlers. Laptops use 1,686.6 watt hours (1.69 kWh) of electricity per month, on average.

For perspective, this is equivalent to:

  • How many watts a microwave uses (specifically, a microwave with a power output of 1200W) in 1 hour.
  • How much electricity a dishwasher uses after less than 1.5 cycles.
  • How many watts a TV uses after running for nearly 29 hours.

So, when compared to common household appliances at least, laptops do not use a lot of electricity. As a result, they’re relatively inexpensive to run, costing just $0.25 per month on average.

How much energy does a laptop use and how can I reduce it?

So, you almost definitely want to save money on your electricity bill and you probably want to be greener too. Is there technology that can help?

A laptop manufacturer will tell you that their 16 inch laptop consumes about 50kWhs per year, costing around £7.18 or 14Kgs of CO2 with typical use. They are giving you the best case scenario here of course, which means you are charging the laptop up, discharging the battery and charging it up again, whilst also shutting the thing down after each time it is used.

So, lets be real here, we leave the thing plugged in all day and night and let’s face it… we don’t always shut down at the end of the day! Then let’s bring students into the equation.

Let’s say you have a set of 32 laptops for classes. Your average student is even less likely to shut the school machine down at the end of its use and there won’t be anyone to unplug the laptops when they are fully charged. Thus, the battery is constantly being topped up which constantly be consumes energy.

With our estimations we can assume that school laptops are consuming more like 140 kWh per year. This costs around£20 and produces around 40kgs or CO2. Not terrible on its own, but if you look at your full set of 32 that is £640 and 1.2tonnes of CO2!


How Much Energy Does a Laptop Use – Depending on the model, a laptop can use anywhere from about 3 to about 17 watts of power. So if you’re looking to avoid using up your battery quickly, try to keep your laptop usage within these ranges.

A laptop uses a considerable amount of energy. For example, the average laptop uses about 2.5 Watts for an hour of use. This means that if you left your laptop plugged in all day, it would use about 10 kWh of electricity!

How much energy does a laptop use? A typical laptop uses about two-thirds of the power of a desktop computer. For example, a 15-inch laptop requires about six watts of power while a desktop computer uses around eighty watts.