An electric doorbell transformer uses
approximately 1 to 2 watts; on average, it operates for about 6 hours a
day.
Enter the number of usage hours and power setting (in wattage), then click "Calculate"
to find the power consumption
of electric doorbell transformer using 2 watts for 6 hours
a day at $0.12 per kWh. You will also see the running cost per hour, day, week, and year.