how much electricity does a computer use per day?
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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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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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Most modern devices use no more than 1 watt in standby mode, and many of them use less than 0.5 watts. But the typical American household uses 11,040 kWh per year. So the standby power for one device represents a mere 0.08% of the household's energy use.
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One LED light bulb uses around 8-12 watts per day. This means that an average home uses 360 – 450 watts per day of energy for lights. A solar panel can produce 250 watts per hour. If the solar panel is powered by the sun for four hours, that means that it produces around 1,000 watts a day.
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How much electricity does a laptop use per hour in the UK? 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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Using your desktop computer At an average of 28 cents per kWh, a low end machine (110w with CRT monitor) can cost as much as $90 per year if left on for 8 hours per day. Adding the cost of the printer, scanner, speakers and other peripherals, and the bill can easily tip over $100 per year.
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Your average laptop, with its far bigger screen, uses about 72 kWh, costing some $8 a year. That's right, you can run your phone, iPad and laptop for a whole year for about $10 -- less than the cost of three gallons of gasoline.
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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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How much electricity does my television use? Most TV's use about 80 to 400 watts, depending on the size and technology. Using a sample cost of 15¢ per kilowatt-hour and five hours of viewing a day, that's $1.83 to $9.13/mo. ($22 to $110 per year).
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Completely charging a laptop will cost around 1 to 3 cents in electricity usage, depending on the size of the specific laptop's battery, as well as your electricity usage rate. Small laptops, such as notebooks, generally have a 30-50Wh battery capacity, costing 1 to 1.5 cents to charge.
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The usage is a little more than 1/2 kilowatt hour per 24 hours, which, depending on your local electricity rates, equates to about 6 or 7 cents a day.
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The average energy consumption of a gaming PC is around 1,400 kWh per year.
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Researchers for the EST closely monitored the electricity use in 250 homes to work out the average kilowatt per hour consumption that appliances take to run. They then multiplied this by an average electricity price of 14.5 pence per kWh.
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Each day, U.S. per capita energy consumption includes 2.6 gallons of oil, 11.5 pounds of coal, and 250 cubic feet of natural gas. Residential daily consumption of electricity is 12.2 kilowatt-hours (kWh) per person.
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Many Appliances Use Just as Much Power When Off Always leaving a laptop computer plugged in, even when it's fully charged, can use a similar quantity — 4.5 kilowatt-hours of electricity in a week, or about 235 kilowatt-hours a year.
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And the DOE says that anywhere from 5% to 10% of your residential electricity is sapped by devices that are plugged in 24 hours a day. Experts say that most plugged-in appliances generally only eat up low levels of electricity, just about a watt or two.
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Other sources estimate that a 10KB email uses up to 0.074 microwatts of electricity, and a 500KB email up to 3.7 microwatts.