Impressions are calculated when dividing the total cost of the campaign by the result of CPM divided by 1000, or dividing the number of clicks by the CTR. This is the formula to calculate impressions:
Use our PPC Calculator to automatically calculate impressions and other Google Adwords metrics.
I have budget of $250, and i have to use this amount in 3 weeks, how can I calculate Impression, if my CPC is 1.5?
You'll need to add an extra variable to the formula: CPM or CTR. I invite you to use my PPC Calculator for a more agile calculation.