What engagement rate tells you
Engagement rate turns raw likes and comments into a share of your audience, so a post on a small account and a post on a large one can be compared fairly. One hundred comments mean something very different on an account with 2,000 followers than on one with 200,000.
The calculation itself is simple: engagements divided by a base, times 100. The hard part is that "engagement rate" is not one standard number. Tools, agencies and networks use different bases and count different interactions, so two reports about the same post can disagree.
Choosing a method
- By followers answers "how much of my audience engages with a typical post?". It works for any account, including ones you do not manage, because follower counts are public.
- By reach answers "of the people who saw it, how many engaged?". It needs the account's own analytics, and it judges the content rather than the size of the audience.
- By impressions counts every view, including repeat views, so the rate is usually lower than by reach. It is common in paid social and LinkedIn reporting.
Whatever you pick, write it down and use it every time. Mixing methods is the most common reason engagement rates seem to jump from month to month.
Use it to compare your own posts
The most useful comparison is with yourself: the same account, the same method, over time. Calculate the rate for a set of recent posts, then check which formats, topics and posting times sit above your own average. PostBoost analytics shows engagement for your connected accounts on supported networks in one place, which saves copying numbers from each network by hand.