Instagram engagement rate calculator

Using it

1. Followers: copy it from the profile. Rounded figures such as 3.2K are fine.
2. Average likes: add up the likes on your last eight to ten posts and divide by the number of posts. Leave out a giveaway or a one-off post that travelled much further than usual.
3. Average comments: the same, ideally without counting your own replies.
4. Saves and shares only appear in your own Insights, so add them for your own account and leave the box empty for anyone else’s.

Prefer not to count? Use “Fill from an Instagram account” above the form and we’ll fetch the follower count and recent averages for a public account.

The sum behind it

Engagement rate by followers is average interactions per post, divided by followers, times 100. With 3,200 followers, 95 likes and 7 comments, that’s 102 ÷ 3,200 × 100 = 3.19%: about three in every hundred followers react to a typical post.

Some tools divide by reach instead, which you can only see for your own account. Reach-based rates come out higher. Neither is wrong; just compare like with like, and compare yourself with yourself over time.

What moves the number

• Format. Reels, carousels and single photos often perform differently. Work out a rate for each if you post a mix.
• Hidden likes. If an account hides like counts, you can’t measure it from outside.
• Follower jumps. Any sudden rise in followers lowers the rate until engagement catches up. That applies to a bought package too, so run the numbers before and after if you’re thinking about one.

A likes package raises the like count on a single post; it doesn’t add comments or change how your followers behave. The guide does buying followers work? covers how packages affect engagement in more detail.

Reading your result in context

A single percentage means little on its own. Three comparisons make it useful:

• Against your own past. Work out the rate once a month from the same number of recent posts. A slide from 3.4% to 2.1% over a quarter tells you more than any benchmark.
• Against accounts your size. Smaller accounts usually score higher because more of their followers know them. A 900-follower café on 6% and a 40,000-follower food account on 1.8% can both be doing well.
• Across formats. Run Reels, carousels and single photos separately. If carousels score twice what photos do, that is a content decision made for you.

Here is a worked comparison for a Nottingham florist with 2,400 followers. Photos average 70 likes and 4 comments: 74 ÷ 2,400 × 100 = 3.08%. Carousels average 115 likes and 9 comments: 124 ÷ 2,400 × 100 = 5.17%. The account isn’t “3% engagement”; it has one format that people respond to far more.

Before and after a follower jump

If you’re weighing up a follower package, put the new total into the followers box with your current likes and comments. The florist above adding 1,000 followers would see the photo rate move from 3.08% to 74 ÷ 3,400 × 100 = 2.18%. That’s the honest cost of a bigger number: bought followers don’t react, so the same interactions are spread over more people. Our guide to engagement rate walks through more examples, and how to spot fake followers explains what brands look for when the two numbers don’t match.