Engagement rate
Engagement rate is how often people interacted with an ad, divided by a base. An engagement is a like, comment, share, save, or click, depending on what you count. The base is usually impressions (how many times the ad was shown) or reach (how many different people saw it). Name both the actions and the base, or the same campaign can show three different rates.
Theodor Lindfors, Founding Marketer ·
Formula
Engagement rate = engagements / base (impressions, reach, or followers)
How to calculate engagement rate
Let's take a drink brand as an example. They sell a low-sugar sports drink for active women over 50, mostly from their own website. Typical ads run on Meta, TikTok, and YouTube. A TikTok of a morning walk with the bottle in the cup holder can collect likes, comments, saves, and profile taps. Engagement rate is those actions divided by a base you have to name.
Divide engagements by the base and multiply by 100. 3,000 engagements on 100,000 impressions is 3%. The same 3,000 engagements on 40,000 reach is 7.5%. Nothing about the campaign changed. Only the denominator did. Let's take a drink brand as an example. They sell a low-sugar sports drink for active women over 50, mostly from their own website. If the brand reports 7.5% to a partner who expected an impression base, the meeting becomes an argument about math.
Why the base decides the number
Impressions count every delivery, so a high frequency campaign will show a lower engagement rate on the same audience. Reach counts people, which is usually the fairer base for comparing creative. Followers only make sense for organic posts and is meaningless for paid. Let's take a drink brand as an example. They sell a low-sugar sports drink for active women over 50, mostly from their own website. Boosting a TikTok should not divide by follower count.
Pick one base, write it in the report header, and keep it. Most arguments about engagement rate are actually arguments about denominators.
How to read engagement rate
Split the engagement types. A rate driven by outbound clicks means something different from a rate driven by emoji reactions. If the campaign's job is revenue, CTR (click-through rate: clicks divided by impressions) and downstream conversions matter more than total interactions. Let's take a drink brand as an example. They sell a low-sugar sports drink for active women over 50, mostly from their own website. The brand can win comments and still miss the site.
For video, hook rate is usually the sharper creative signal, because it isolates the first seconds instead of blending every interaction into one figure.
Common engagement rate mistakes
- Comparing a drink brand's impression-based TikTok rate to a reach-based Meta rate.
- Reporting engagement rate as the headline on a direct response campaign.
- Counting cheap reactions and outbound clicks as the same unit of interest.
Lemonado
How Lemonado helps with engagement rate
A drink brand's TikTok engagements are not Meta's. Lemonado keeps the base and the action definition attached to the metric, so a cross-channel engagement comparison is honest rather than convenient.