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How much electricity does a laptop consume per hour and per month?

 electricity does a laptop consume

So how much power per hour does a laptop consume? Let's try to find the answer to this rather interesting question.


Choosing a laptop

If you are just planning to buy a laptop, then try to pay attention primarily to energy-efficient models. The computer may cost you a little more, but in this way you can save a little on electricity, so that over time the laptop will pay for itself. It is also worth considering that different models spend electricity differently. This depends more on the purpose of the laptop. To find out how much electricity a laptop consumes per hour, you need to consider its different types. Unfortunately, we will not be able to get accurate results.

Energy costs of a working laptop

Let's look at a laptop with averages. Let's say you bought a laptop computer for work. On average, the user works 8 hours a day. As a rule, most of the time is spent on working on the Internet, office applications and simple computer games. In this case, the laptop will consume about 80 watts per hour. On the meter for 8 hours of operation will run about 0.640 kW. For a month you will get about 19, kW. Agree, a good result. But this is just an average laptop on which users just work. Let's move on to the next example.

Consider a gaming laptop. How much electricity a laptop with a gaming graphics card and a good processor will consume. A portable gaming computer will consume approximately 190 watts. It's hard to calculate how much energy a single user will expend with this technique. Different users spend different time at the computer. Suppose you play computer games for an average of six hours a day. Thus, in one day you will spend about 1.14 kW. In a month, this will be approximately 34.2 kW. That's quite a lot.

Let's take a look at how much power a laptop running in server mode consumes. There are people who use their computer as a server on which they store video files and photos. Such a laptop of course does not have high technical characteristics. Its main feature is a capacious hard drive, with a capacity of several terabytes. Such a computer per hour will consume about 30 watts of energy. If it works around the clock, then in a day it will spend about 0.72 kW. In a month, this will be approximately 21.6 kW.

How to determine how much electricity your computer is consuming

We have already found out that electricity consumption can depend on many factors. These are both the tasks performed and the technical characteristics of the computer you are using. However, these indicators do not allow you to accurately determine how much electricity the laptop will consume per hour. If you buy a new computer, you can determine its capacity and calculate the approximate costs. The power level must be specified in the documentation. However, there may also be situations when you purchase a laptop on which no power data is presented. In this case, you will not be able to find out the approximate costs, unless you are going to completely disassemble the device. So, let's see how you can find out the amount of energy consumed by a laptop. There are two fairly effective ways, which we will now consider.

The exact way. Today, you can purchase a special device that can determine the consumption of electricity. Such a device today can be bought on the Internet or in store. The cost of a conventional wattmeter starts from $ 15. It is for this amount that you can buy the simplest model. If you want to use a more advanced model, then you'll have to shell out at least $30. How does it work? You must plug the wattmeter into the outlet next to your laptop. A few seconds later, the device will give you all the information you are interested in.

An exemplary method. If you do not want to spend money on the purchase of various devices to determine the consumption of electricity, then you can try to use an alternative method. However, it is worth noting that this method is not accurate. First, you need to turn off all electrical appliances from the network and leave only the 100-watt lamp on. Now you need to go to the counter. Here you will need to determine how many revolutions the counter will make in 30 seconds. Remember this number. Now turn off the light bulb and turn on the computer. You will need to calculate how many revolutions the meter will make when the laptop is plugged into the network. If the revolutions are much greater, then it is necessary to repeat this experiment, but using a more powerful light bulb, for example, at 200 watts.

What is the difference between power modes?

Modern technologies today can significantly reduce the level of electricity consumption. If you need to move away for a while, then it is simply impractical to completely turn off the laptop. To save money, you can switch the device to a different mode of operation. To do this, you need to run a certain program that will slow down or turn off some components of the device. If you start working on your laptop again, the program will automatically start all deactivated processes. Thus, the user has the opportunity to save on the included device. The laptop in standby mode does not work, but it still consumes electricity, since the program is active and processes can resume at any time as soon as the user indicates this. If your computer goes to sleep, it will only take 30 seconds for the component to activate. The second sleep mode is hibernation or inactivity. This mode is somewhat reminiscent of the off state. At the same time, electricity costs will be minimal. Even if you turn off the device completely, it will unfortunately waste some energy. This is due to networking capabilities.

How much energy is spent in sleep mode?

A laptop in sleep mode consumes very little power, but it's still twice as much as when it's off. A personal computer constantly needs power in order to maintain the memory of the system and activate all tasks when the operating mode is turned on. How much energy does a laptop spend in sleep mode? Average computers typically spend about 10 watts per hour. It should be noted that laptops consume less electricity compared to desktop computers. According to statistics, a portable device is three times more economical than a stationary one.


As mentioned earlier, hibernation mode is a second sleep mode. It resembles a complete shutdown of the computer, but in this case the data is saved in the file. To start working with the laptop again, you will have to wait a little, because the inclusion in this case is slower than when using normal sleep. In this mode, the computer consumes approximately 5-10 watts per hour.

Off state

Data is not saved in this mode. To continue, you will need to turn the device back on. But even in such a disconnected state, the laptop will still consume electricity. In an hour, it will be about 4 watts.

How much electricity does a laptop consume in a month

We can't calculate exactly how much power a laptop consumes per month, but we will try to get an average value that will allow us to at least roughly estimate the cost of electricity from a laptop. How much electricity does a laptop consume? Let's say you have an average laptop that you use for work and play. On average, you work on the device for 4 hours a day and play for 3 hours a day. The cost of electricity during operation is 0.4 kW, and for games - 0.45 kW. It is also worth not forgetting about 17 hours of inactivity, which, depending on the mode, will require from 68 to 170 watts. As a result, the cost of non-electricity per month will be approximately 30 kW.