A laptop uses
approximately 35 to 70 watts; on average, it operates for about 3 hours a
day.
Enter the number of usage hours and power setting (in wattage), then click "Calculate"
to find the power consumption
of macbook using 70 watts for 3 hours
a day at S$0.24 SGD per kWh. You will also see the running cost per hour, day, week, and year.