Unlock the Secret Facebook Tricks That Instantly Skyrocket Your Engagement!
The Insights section of the Facebook dashboard only has data from the last 28 days. If you want to calculate from a wider range of data, open Facebook Insights in Meta Business Suite instead.
You should calculate your engagement rate by views and follower count.
Calculating by views allows you to see what percentage of Facebook users who viewed your content interacted with it.
Calculating by followers allows you to see what percentage of your following actually interacts with your content on Facebook.