How to Calculate Engagement Rate (Formula for Every Platform)

Engagement rate is interactions divided by an audience number, times 100. The argument is only ever about which audience number. Divide by followers and you get the figure brands use in outreach. Divide by reach and you get the figure that tells you whether your content is any good. Both are correct, they answer different questions, and quoting the wrong one in a pitch is how creators end up looking worse than they are.

The four formulas

• Engagement rate by followers (ERF): (likes + comments + saves + shares) / followers x 100. The industry default. Brands, media kits and every public calculator use this because followers are the only number an outsider can see.
• Engagement rate by reach (ERR): interactions / accounts reached x 100. The honest content quality signal, and always higher than ERF. Only you can see it, in your own analytics.
• Engagement rate by impressions: interactions / impressions x 100. Lowest of the three because one account can generate several impressions. Useful for paid campaigns, rarely quoted otherwise.
• Average engagement rate across posts: run ERF on your last 9 to 12 posts and take the mean. This is what a brand's vetting tool computes, so it is the number worth tracking.

Run yours in a few seconds with the Instagram engagement rate calculator, TikTok engagement rate calculator or YouTube engagement rate calculator.

A worked example

An account with 12,000 followers posts a reel that gets 640 likes, 38 comments, 91 saves and 24 shares, reaching 9,200 accounts. Interactions total 793. ERF is 793 / 12,000 x 100 = 6.6 percent. ERR is 793 / 9,200 x 100 = 8.6 percent. Same post, two very different headline numbers. In a media kit you quote 6.6 percent, because that is what the brand can verify from the outside, and you mention the 8.6 percent as reach-based context.

What counts as a good engagement rate

Rates fall as follower counts rise, so a benchmark without an audience size attached is meaningless. Using engagement rate by followers on recent posts:

• Instagram, under 10k followers: 3 to 6 percent is healthy, above 6 percent is strong.
• Instagram, 10k to 100k: 2 to 4 percent is healthy. Below 1 percent, brands start asking questions.
• Instagram, over 100k: 1 to 2.5 percent is normal.
• TikTok: runs much higher because the feed is not follower-gated. 5 to 10 percent is common, and the metric brands care about more is average views as a share of followers, where 10 percent or better is the bar.
• YouTube: 2 to 5 percent on likes and comments against views. Against subscribers, a view rate above 20 percent matters more to a sponsor than the like ratio.
• LinkedIn: 2 to 4 percent, and comments carry far more weight than reactions.

An engagement rate far above these ranges is not automatically good news. Pods and bought engagement produce inflated numbers that collapse under an audience audit, and any brand with a vetting tool will run one. The fake follower checker shows what they will see.

Which interactions to include

Older formulas count likes and comments only. That understates every account posting reels or short video in 2026, because saves and shares are the signals the ranking systems weight most heavily. Include likes, comments, saves and shares, and say so when you quote the number. A brand comparing two creators will not care which convention you used, only that you named it.

How to fix a low engagement rate

1. Check reach first. If ERR is healthy but ERF is low, distribution is the problem, not the content. You are reaching a small slice of your followers and the fix is hooks and posting consistency, not more posts.
2. Cut dead followers. Inactive and bot accounts sit in the denominator forever. Removing them raises the number that brands see.
3. Ask for the interaction you want. Save-worthy content needs a reason to save. A single spoken line at the end of a video moves save rate more than any caption change.
4. Reply to every comment in the first hour. Replies count as comments and the early window is when distribution is decided.
5. Move conversation into DMs. A comment that triggers an automated DM turns a passive like into a conversation and an email address you keep. Comment to DM automation covers the setup.

Engagement rate is a proxy. The number that pays is how many engaged followers end up somewhere you own, because a follower count can be throttled by a feed change overnight and an email list cannot.