how much electricity does laptop use?
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A laptop typically uses about 50 watts of electricity, the equivalent of 0.05 kWh. This means that if a laptop is on for eight hours a day, it will cost 5p a day to run the laptop (based on an average energy unit cost of 12.5 p/kWh).
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Step 1. Buy a solar panel that is powerful enough to run the computer you want to use it with. Small netbook computers use 45 to 60 watts of power, but a larger laptop or gaming notebook may use as much as 90 watts.
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Most computers are built to use up to 400 kilowatts of electricity per hour, but they usually use less than that. The average CPU uses about as many kilowatts per hour as the typical light bulb.
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According to its Bitcoin Energy Consumption Index, the network of computers that verify bitcoin transactions draw 3.4 Gigawatts (GW) — a single watt is a joule per second, and your laptop probably probably uses about 60W.
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You use it for two hours a day, five days a week. That's 105 watts x 10 hours/week x 52 weeks/year = 54,600 watt-hours, or 54.6 kWh. If you're paying 10¢ per kilowatt-hour, then you're paying about $5.50 a year to run your computer. That's quite a range, $5.50 to $631 a year.
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Every time a person runs a Google search, watches a YouTube video or sends a message through Gmail, the company's data centers full of computers use electricity. Those data centers around the world continuously draw almost 260 million watts — about a quarter of the output of a nuclear power plant.
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A laptop uses about half the amount of electricity as a desktop, about 32.3 watts. When in standby mode, a laptop uses very little electricity- around 1.6 watts to be exact.
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Desktop. Generally speaking, desktop computers use 60 to 300 watts per hour. Yes, that's a pretty big range, but that's because the amount of energy that's required to power a desktop fluctuate based on what the desktop is used for.
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A fully charged cell phone plugged into the wall is consuming about 2.24 watts, or 60 percent of the power it consumed while charging. Even worse is a charged laptop that's still plugged in, which consumes 29.48 watts, 66 percent of the 44.28 watts consumed while charging.
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In any case, laptop chargers all have a maximum wattage (power) they can output at any point in time, and it usually hovers around the 60–90W. However, what your laptop consumes will (usually) be much lower than that depending on several factors. Notably: If the internal battery is also charging.
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A year is 8760 hours. So the laptop on 24/7 would cost $32.40 at 10 cents and $64.80 per year at 20 cents. The desktop on 100% full power 24/7 would cost about $193 to $386.
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A desktop uses an average of 200 W/hour when it is being used (loudspeakers and printer included). A computer that is on for eight hours a day uses almost 600 kWh and emits 175 kg of CO2 per year. A laptop uses between 50 and 100 W/hour when it is being used, depending on the model.
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An average tablet uses 15 watts of power, which equates to around three cents per day if plugged in for 8 hours.
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That means the average iPhone uses (19kw X 19 GB) 361 kwh of electricity per year. In addition, ATKearney calculates each connection at 23.4 kWh. That brings the total to 384.4 kWh. The electricity used annually to charge the iPhone is 3.5 kWh, raising the total to 388 kWh per year.
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The typical wireless router wattage is around six, and the most demanding models only draw about 20. At ten cents per kWh, that six-watt router will use about a cent and a half's worth of electricity per day, adding up to $5.26 per year.
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Apple currently makes several Mac laptop models and supplies each one with a 45-watt, a 60-watt or an 85-watt power adapter to charge the battery and run the computer on electricity. The company states that you should always use the specific power adapter that came with the computer.
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The short answer is: yes, it'll handle it. Mine are typically on 24 hours a day, 7 days a week. The longer answer, however, is more complex. There are trade-offs to be made when deciding to leave your laptop running all the time.