Engagement rate explained
What engagement rate actually measures on Instagram and TikTok, the three ways to work it out, and why the same post can score 4% or 7% depending on the sum.
Updated 19 October 2026
The short answer
Engagement rate is the share of people who react to a post: interactions divided by an audience figure, times 100. The audience figure can be your followers, the post’s reach, or (mostly on TikTok) its views, and each gives a different number for the same post. Pick one method, use it every time, and compare yourself with yourself.
The three formulas
Every engagement rate is a fraction with the same top line and a different bottom line. The top line is interactions: likes and comments at the very least, and saves and shares too if you can see them. The bottom line is where the methods split.
By followers
Interactions on a post ÷ followers × 100. This is the only version you can work out for someone else’s account, because follower counts, likes and comments are public. It’s what most quick checkers use, including our Instagram engagement rate calculator. Its weakness is that followers aren’t the same thing as the people who actually saw the post.
By reach
Interactions ÷ accounts reached × 100. Reach is the number of unique accounts that saw the post, and it lives in your own Insights, so only the account owner can calculate it. It tends to come out higher than the follower version, because the people who didn’t see a post can’t react to it and are left out of the sum.
By views
Interactions ÷ views × 100. This is the standard on TikTok, where most plays come from the For You feed rather than from followers, and it’s what our TikTok engagement rate calculator leads with. Instagram has also moved towards views as a headline figure in Insights, so you can work out a views-based rate for a Reel. Views count repeat plays, so this figure usually sits below a reach-based one.
Worked example: one Instagram post, four answers
Take a Nottingham florist with 2,400 followers. Her latest carousel has 110 likes, 8 comments, 6 shares and 14 saves. Insights says it reached 1,900 accounts and had 3,100 views.
- Likes and comments by followers: (110 + 8) ÷ 2,400 × 100 = 4.92%
- All interactions by followers: (110 + 8 + 6 + 14) ÷ 2,400 × 100 = 138 ÷ 2,400 × 100 = 5.75%
- All interactions by reach: 138 ÷ 1,900 × 100 = 7.26%
- All interactions by views: 138 ÷ 3,100 × 100 = 4.45%
Same post, same evening, and the “engagement rate” runs from 4.45% to 7.26% depending on who’s doing the sum. None of them is wrong. The trouble only starts when someone compares a reach-based figure from one account with a follower-based figure from another.
| Method | Sum | Result | Who can work it out |
|---|---|---|---|
| Likes + comments ÷ followers | 118 ÷ 2,400 | 4.92% | Anyone |
| All interactions ÷ followers | 138 ÷ 2,400 | 5.75% | Owner (saves and shares are private) |
| All interactions ÷ reach | 138 ÷ 1,900 | 7.26% | Owner only |
| All interactions ÷ views | 138 ÷ 3,100 | 4.45% | Owner only |
Worked example: one TikTok video
A Swansea climbing coach with 1,200 followers posts a short clip of a beginner’s first lead climb. It gets 9,500 views, 640 likes, 22 comments, 31 shares and 47 saves, so 740 interactions in total.
- By views: 740 ÷ 9,500 × 100 = 7.79%
- By followers: 740 ÷ 1,200 × 100 = 61.67%
The follower figure looks absurd because most of those 9,500 viewers have never heard of him; TikTok put the clip in front of them anyway. That’s why the views-based rate is the one worth tracking on TikTok, and why a follower-based TikTok number shouldn’t be set next to an Instagram one as if they meant the same thing.
Why small accounts score higher
Run the follower-based sum on a big account and the result is usually lower. A fitness account with 80,000 followers averaging 1,900 likes and comments a post scores 2.38%, less than half the florist’s 4.92%, even though 1,900 reactions is far more than 118. A few reasons explain the pattern:
- Closer audiences. The first few hundred followers are often friends, customers and regulars, who react because they know the person.
- Old follows go quiet. An account that has been growing for years carries followers who stopped using the app, changed interests or followed once for a giveaway.
- Not everyone sees every post. As a following grows, a smaller share of it tends to see any single post, and only people who saw it can react.
- Viral spikes bring loose ties. Followers gained from one widely shared Reel or video often followed for that one thing.
So a low rate on a big account isn’t automatically a warning sign, and a high rate on a tiny one isn’t automatically impressive. Size is part of the context.
What counts as a good rate: our rough guide
There’s no official scale. Instagram and TikTok don’t publish one, and the figures you’ll see quoted vary a lot depending on who measured what. The bands below are our own rough guide, based on the methods above. They are not industry data, and niche, format and size all move them.
| Our rough band | Instagram, by followers | TikTok, by views |
|---|---|---|
| Low | Below 1% | Below 3% |
| Common | 1% to 3% | 3% to 9% |
| Good | 3% to 6% | Above 9% |
| Unusually high | Above 6% | Check for an outlier video |
Treat a rate well above these bands with a little suspicion, especially your own. It often means the average includes one post that took off, or a giveaway where people commented to enter.
What brands actually look at
A brand deciding whether to pay you isn’t usually satisfied with a single percentage. Expect some mix of the following:
- Consistency. Ten posts at 3% read better than one at 20% and nine at 0.5%.
- The comments themselves. Real sentences about the post count for more than strings of emojis or generic “nice pic” replies.
- Insights screenshots. Many ask for reach, views and audience breakdowns such as location and age, which only the account owner can supply.
- The follower graph. A sudden step up with no matching rise in engagement is something they’re trained to notice. Our guide on how to spot fake followers covers the checks they tend to run.
- Saves and shares. They suggest people found something worth keeping or sending, which is closer to what an advertiser wants.
If you’re wondering what a rate is worth in money terms, our Instagram money calculator and TikTok money calculator give a rough estimate from followers and engagement.
How follower jumps lower the rate
Because the follower method divides by followers, anything that adds followers faster than it adds reactions pulls the number down. That’s true of a shout-out from a bigger account, a viral moment, and a bought package alike. Bought followers don’t like, comment or watch, so they add to the bottom of the fraction and nothing to the top.
Before and after: Instagram
Back to the florist. Before: 118 likes and comments on 2,400 followers is 4.92%. She adds 2,500 followers (a $22.99 package, about 0.92¢ each), taking her to 4,900. Her real audience hasn’t changed, so the next post still gets around 118 likes and comments:
- After: 118 ÷ 4,900 × 100 = 2.41%
The rate has roughly halved, from the top of our “good” band to the middle of “common”. Her reach-based rate barely moves, because accounts that don’t use the app don’t tend to show up in reach either. That’s one more reason to quote reach figures from Insights if a brand asks.
Before and after: TikTok
On TikTok the follower count barely matters to the views-based rate, but views do. If the climbing coach added 10,000 views to his clip ($9.99, about 0.1¢ each), the plays would rise to 19,500 while the interactions stayed at 740:
- Before: 740 ÷ 9,500 × 100 = 7.79%
- After: 740 ÷ 19,500 × 100 = 3.79%
A likes package on the same video would offset part of that, but it adds likes only, not comments, saves or shares, and anyone reading the comments can still see the difference. If engagement rate is the number you’re judged on, a follower or view package works against it, and it’s worth knowing that before you buy. The guide does buying followers work? sets out what a package does and doesn’t change.
How to raise it honestly
- Give people a reason to reply. A specific question (“which of these two would you pick for a May wedding?”) gets more comments than “thoughts?”.
- Make things worth saving or sending. Price lists, how-tos, before-and-afters and local recommendations get kept and shared.
- Answer comments. Replies keep a conversation going under the post, though leave your own replies out when you count.
- Earn the first seconds. On TikTok and Reels, people who swipe away early don’t react; open with the result or the question, not a logo.
- Post less, better. A weak post drags your average down; three good ones a week can beat seven rushed ones.
- Clear out obvious dead weight. Instagram lets you remove followers. Removing clearly empty accounts lifts a follower-based rate, though it doesn’t change reach or how many people react.
Common measuring mistakes
- Measuring too soon. A post a few hours old is still collecting likes. Measure posts that are at least a few days old.
- Counting your own replies. If you answer every comment, your comment count can double. Count other people’s only.
- Letting one outlier set the average. Use your last eight to ten posts and leave out giveaways and the odd one that went viral, or report them separately.
- Mixing formats. Reels, carousels and single photos behave differently. Work out a rate for each if you post a mix.
- Using TikTok’s profile likes total. The heart count on a TikTok profile is all likes ever received. Dividing it by followers tells you very little about recent videos.
- Comparing methods. A reach-based 7% and a follower-based 4% may describe the same post. Always say which method you used.
Want to see your own figure? Both calculators are free, need no sign-up and show the sum they used.
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