How is your CPM calculated?
BillboardHub uses the 4-week rate cost to calculate the average CPM per ad space.
The number of daily impressions is multiplied by 28 days. Then the 4-week Rate $ is divided by the total number of impressions and finally multiplied again by 1000.
Example: Billboard #001 costs $700 per 4-week cycle and receives 18,975 daily impressions.
Calculations: CPM = (18,975*28) / 700 * 1000
CPM = ( 531,300 ) / 700 * 1000
CPM = ( 0.00138 ) * 1000
CPM = 1.38 $
Note: The actual value of CPM will fluctuate due to changes in traffic conditions (weather, construction, etc.)