The annual energy consumption of the average office computer and monitor is influenced by two factors.
Computer energy consumption kwh.
A desktop uses an average of 200 w hour when it is being used loudspeakers and printer included.
A typical desktop computer uses about 65 to 250 watts.
To find the figure for your particular computer you can contact the manufacturer not me or see my section on measuring electrical use.
But you don t use exactly 1000 kwh or exactly 2000 kwh.
Click calculate to find the energy consumption of a desktop computer using 100 watts for 6 hours a day 0 10 per kwh.
Usage and which parts are in them.
A laptop uses between 50 and 100 w hour when it is being used depending on the model.
A television using 0 375 kwh of electricity per day 0 375 kwh x 30 days 11 25 kwh month.
Kompulsa has an energy usage calculator that you can use to calculate the energy usage of a computer and the monthly power cost.
In the us the average cost of electricity is about 13 cents per kilowatt hour kwh a measurement of electricity usage over time.
The power consumption of a computer varies depending on whether it is a desktop or a laptop.
It can also calculate fuel requirements for a trip and your mpg.
So a 125 watt television that you use for three hours per day adds up to 11 25 kilowatt hours of energy per month.
But electricity is more costly in certain areas than others.
We estimate that an average modern desktop pc will use approximately 100 watts of power not including the display screen.
Since our local power company charges an average of just more than 15 cents per kilowatt hour our household s computer energy bill is in the vicinity of 1 a month.
How much electricity do computers use.
Select air conditioner clothes dryer clothes iron dishwasher electric kettle fan heater microwave oven desktop computer laptop computer refrigerator stereo receiver television toaster oven vacuum cleaner washing machine water heater.
Annual energy consumption ranges from 52kwh to 482kwh per year for computers and from 22kwh to 754kwh per year for monitors.
A computer that is on for eight hours a day uses almost 600 kwh and emits 175 kg of co 2 per year.
The power consumption of computers varies significantly due to two key factors.
This advertised price per kwh doesn t apply the same in different households that use different amounts of energy.
Add another 20 40 watts for an lcd monitor or about 80 watts if you have an old school 17 crt.
Electricity companies advertise their best price per kwh rates based on an exact monthly usage usually 1000 or 2000 kwh.
Different usage patterns and user behaviour.
