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Look at the power supply or back of any semi-sophisticated electronics device you want to know the kilowatt usage of. It should have one number on it with an "A" next to the number. This is the amperage. Multiply that by 120 (Alternating Current) and you have the wattage. Divide by 1000. After that, as you may be able to figure yourself already, if you use that device for one hour then you will be said to be using it for that many kilowatts. Example: I have a 1.5A laptop. (it may even say 1,5A) Multiply by 120. 180 watts Divide by 1000. 0.18 kilowatts If I use my laptop for one hour, it will consume at the most 0.18 kilowatts. It may be less because you do not use 100% of your CPU every second, and there may be power-saving features such as auto-off screen, modem or network card working. The best energy saving feature you can use is the one that turns off the screen, but keep in mind if you use anything like DSL/Cable that device usually has its own power supply and it can be more than a laptop. Also, if you want to do the math to find the cost of running your laptop for one straight month, multiply the kilowatts by 730.5 and then by your local power company's charge for each kilowatt-hour. Mine charges $0.1412, so the laptop would cost $18.56 if it was used at full capacity for approximately 30 days, and just multiplying again by 12 months gives me a yearly maximum of $222.80. You could probably reach that number if you turned off all power-saving features, ran a program that can hammer the processor like a math program using WiFi and/or networking simultaneously. If you have free time to burn, I recommend going to SETI@home and have your computer join the search for possible life beyond our world.

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Wiki User

15y ago
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Wiki User

12y ago

it differs from laptop to laptops ! gaming laptops will take upto 100 to 110 watts.

normally 60 to 80 watts

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Wiki User

11y ago

A typical laptop computer will use around 2-2.5 amps, or 20-30 watts. This will vary depending on the laptops size, power usage, and memory capacity. It can also vary from country to country.

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14y ago
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Wiki User

13y ago

It depends on the laptop, and on the power status of the laptop.

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Wiki User

8y ago

About 100 to 110 watts.

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shaun keeffe

Lvl 2
3y ago

60watts

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Q: How many kilowatts does it take to run a laptop?
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