Answer the questions highlighted in blue, then click Calculate:

   
Computer & Monitor Power Consumption? Watts
In use for how many hours a day? Hours
Annual Power Consumption KWh
Annual Carbon Dioxide output Metric Tonnes
   
Idle for what percentage of the day? %
Power Consumption during Carbon Saver (Standby) mode Watts
   
Annual Power Saving via Carbon Saver rather than Screen Saver KWh
Annual Carbon Dioxide Saving via Carbon Saver rather than Screen Saver Metric Tonnes
 

Number of Computers worldwide adopting Carbon Saver initiative - any value from 1 (Tell your friend) to 575,000,000 (Tell every PC user)

 
Annual Power Saving KWh
Annual Carbon Dioxide Saving Metric Tonnes