How much electricity does a computer use if left on overnight with the monitor turned off?
According to the website of Mr. Electricity, Michael Bluejay, a computer uses about 65 watts when in regular mode, and anywhere from 3 – 35 watts in standby or hibernate. Your computer could use less or more, depending on your power supply and whether any programs are scheduled to run during that overnight time. But in the interest of keeping it simple, using Mr. Electricity’s figure of 65 watts and guessing 10pm to 8am as “overnight” (ten hours) 65 watts x 10 hours = 650 watts, or 0.65 kwh (kilowatts per hour) used overnight. At .65 kwh, using the U.S. Dept of Energy figure of 8.2 cents per kwh, running the PC all night will set you back a little over 5 cents each night it stays on. Please remember this is just a hypothetical scenario. You could spend a dime or, in rare cases, a quarter per night. Mr. Electricity’s website: http://michaelbluejay.com/electricity/computers.
According to the website of Mr. Electricity, Michael Bluejay, a computer uses about 65 watts when in regular mode, and anywhere from 3 – 35 watts in standby or hibernate. Your computer could use less or more, depending on your power supply and whether any programs are scheduled to run during that overnight time. But in the interest of keeping it simple, using Mr. Electricity’s figure of 65 watts and guessing 10pm to 8am as “overnight” (ten hours) 65 watts x 10 hours = 650 watts, or 0.65 kwh (kilowatts per hour) used overnight. At .65 kwh, using the U.S. Dept of Energy figure of 8.2 cents per kwh, running the PC all night will set you back a little over 5 cents each night it stays on. Please remember this is just a hypothetical scenario. You could spend a dime or, in rare cases, a quarter per night.
