How to Calculate Engagement Rate: 3 Formulas, Benchmarks
Short answer
To calculate engagement rate, add up a post's interactions (likes, comments, shares and saves), divide by a base number and multiply by 100. The base is either followers, reach or views. Use followers when comparing with industry benchmarks; use reach for your own analysis, because it reflects how people who actually saw the post responded.
Two agencies look at the same Instagram post and quote two different engagement rates. One says 3.4 percent, the other 5.7. Both did the maths correctly. They just divided by different numbers.
That’s the whole problem with this metric. Without the formula next to it, the number means nothing. With it, engagement rate becomes one of the more useful numbers you can track.
The three common formulas
Every version shares the same numerator: the interactions on a post, usually likes, comments, shares and saves. Meta’s Instagram API defines its “total_interactions” metric along those lines, counting likes, saves, comments and shares, then subtracting reversed likes and saves as well as deleted comments.
What changes is the denominator:
| Formula | Calculation | Best for |
|---|---|---|
| By followers | interactions ÷ followers × 100 | Benchmarks and competitor comparisons, since follower counts are public |
| By reach | interactions ÷ accounts reached × 100 | Your own analysis: of the people who saw it, how many reacted? |
| By views | interactions ÷ views × 100 | Reels and video, where views are the headline number |
LinkedIn uses the third logic itself. According to LinkedIn’s help pages, the engagement rate in page analytics is the ratio of interactions to impressions, and clicks count as interactions there.
A worked example
Take a carousel on an Instagram account with 4,800 followers. Seven days after posting it shows 120 likes, 14 comments, 9 shares and 22 saves. Insights report 2,900 accounts reached and 6,100 views.
- By followers: 165 ÷ 4,800 × 100
- 3.44%
- By reach: 165 ÷ 2,900 × 100
- 5.69%
- By views: 165 ÷ 6,100 × 100
- 2.70%
- Range for the same post
- 2.70% to 5.69%
Example values. Interactions: 120 likes + 14 comments + 9 shares + 22 saves = 165.
Same post. Three results, the highest more than double the lowest. That’s why any serious report states how the rate was calculated, and why you should never compare your own figure with a number from a blog post or a tool’s dashboard until you know which base sits underneath it.
For a spreadsheet, put the four interaction types in columns B to E, followers in F and reach in G:
Engagement by followers: =SUM(B2:E2)/F2
Engagement by reach: =SUM(B2:E2)/G2Format the cell as a percentage and you can skip the ”× 100”.
What counts as normal
The benchmark most often cited is Rival IQ’s annual Social Media Industry Benchmark Report. The 2025 edition analyses 2024 data from 2,100 brands in 14 industries and calculates engagement by followers. Across all industries, the median was 0.36 percent on Instagram, 1.73 percent on TikTok, 0.046 percent on Facebook and 0.015 percent on X. Every platform declined year on year; Facebook dropped 36 percent and Instagram 16 percent, according to the report.
Industries vary a lot on Instagram:
Source: Rival IQ, Social Media Industry Benchmark Report 2025
Two caveats. The sample is brands with between 25,000 and one million Facebook fans and, according to its methodology, at least 1,000 followers on Instagram and X, so a local business with 800 followers is only loosely comparable. And Rival IQ itself notes that engagement by reach or impressions would be the truer measure, but platform APIs don’t give it that data.
Other vendors publish benchmarks by reach, which naturally come out much higher. Comparing a 4 percent rate by reach with Rival IQ’s 0.36 percent by followers is comparing apples with oranges.
Which formula to use
My recommendation for small businesses: track engagement by reach internally, and log the follower-based rate as well whenever you want to compare with benchmarks or competitors. The reach version tells you whether a post landed with the people who saw it. It also ignores dormant followers who stopped seeing your content years ago.
For video, the views-based rate is useful but tricky. Instagram has made views its main metric across formats, and repeat plays by the same person count. Reels that loop rack up views and show a lower rate without being any worse.
Platform quirks on TikTok, LinkedIn, Facebook
On TikTok, followers make a poor base, since much of the viewing comes from the recommendation feed, from people who don’t follow you. Accounts with 300 followers can post a video that gets 20,000 views. The follower-based rate would be absurd and meaningless. Use views on TikTok.
LinkedIn gives you a rate out of the box, but by impressions and including clicks. To compare LinkedIn with Instagram, calculate both yourself with one formula rather than putting the native numbers side by side. Facebook shows the lowest brand engagement of the major platforms; a low number there is the norm, not a sign you’re failing.
Account-level engagement
Sometimes you want a figure for a whole month rather than a single post. Two methods are common: average (or median) the rates of all posts in the month, or total the month’s interactions, divide by end-of-month followers and then by the number of posts. The first is simpler and fine for small accounts. Pick one and stick with it.
Common calculation mistakes
- Switching formulas between months.
- Measuring too early. A post isn’t finished after two hours; seven days is a good fixed point.
- Averaging when one viral post skews everything. The median holds up better.
- Including giveaway posts. “Comment to win” inflates the rate and says nothing about normal content.
- Comparing with accounts that bought followers, whose follower-based rate is artificially low.
What engagement rate can’t tell you
It measures whether content triggers reactions. Whether those reactions become enquiries or sales is a separate question. Ten bookings from a post at 0.8 percent beat zero bookings from a post at 6 percent. So the rate belongs in a report alongside two or three numbers closer to revenue; see social media KPIs worth reporting.
Where it shines is comparing topics and formats. Log it in your content calendar for every post and review by content pillar after three months. With many accounts or channels, the calculation can be automated and every platform’s numbers pulled into one analytics dashboard.
Next step: set up columns B to G from the example above and fill in your last ten posts, each measured seven days after publishing. You will then know your own baseline, which matters more than any industry median. Metric definitions are in Meta’s documentation for Instagram media insights.
Step by step
- Count interactions Add up likes, comments, shares and saves from the platform's post insights.
- Pick a base Followers for benchmark comparisons, reach for your own analysis, views for video.
- Divide and multiply by 100 Divide interactions by the base and multiply by 100.
- Record it consistently Use the same formula and the same measuring point, for example seven days after posting.
Questions people ask
What is a good engagement rate on Instagram?
Rival IQ's 2025 report puts the median for brands at 0.36 percent per post, measured by followers. Above that is solid for a business account, though small local accounts are hard to compare with that sample of larger brands.
Do Story replies and profile visits count as engagement?
Most formulas leave them out and stick to the four core interactions. What matters is counting the same interactions every time, so your numbers stay comparable.
Why does my tool show a different engagement rate?
Tools use different bases and different interactions. Some divide by followers, others by reach or impressions. Check the tool's help pages for the exact formula.
Is engagement rate more important than reach?
Not necessarily. A post with a modest rate that reaches many new people and drives enquiries can be worth more. Engagement is a quality signal, not a business goal.
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