We Scored 7,394 Instagram Carousels. Here’s What the Outliers Did

Most carousel advice is opinion. We wanted numbers, and we wanted fair ones.

Raw likes mostly measure audience size, so comparing a celebrity’s carousel with a small creator’s tells you nothing. Instead, every carousel in this study is scored against its own creator’s usual: the median likes + comments of up to 20 of their other carousels posted around the same time. A score of 2× means the post got twice what that creator normally gets. (Here’s exactly how the outlier score works.)

The dataset

• 7,394 Instagram carousels with a score, from 253 creators, collected through September and early October 2026.
• Creators across 13 niches, from AI and business to food, fashion and psychology.
• Every carousel has at least two slides and at least seven comparison posts from the same creator.

One honest caveat up front: these are creators we chose to track because they post carousels regularly. It’s a large sample, not a random one, and every finding below is a correlation rather than proof of cause.

Finding 1: Doubling your usual is rare

By definition, about half of any creator’s posts land at 1× or above. Beyond that, it gets hard quickly:

• 24% of carousels reached 2× their creator’s usual
• 16% reached 3×
• 9% reached 5×
• 4% reached 10×

So a 3× carousel sits in roughly the top sixth of everything its creator posts. If one of your posts does 3× your usual, take it seriously: work out why, and make more like it.

Finding 2: Longer carousels outperform short ones

This was the clearest pattern in the data. Here’s how often carousels of each length reached 2× their creator’s usual:

• 2–3 slides: 16%
• 4–5 slides: 22%
• 6–7 slides: 25%
• 8–9 slides: 24%
• 10 slides: 26%
• 11–15 slides: 28%
• 16–20 slides: 25%

Carousels with 11–15 slides were about 1.7 times as likely to double their creator’s usual as 2–3 slide ones. The gain flattens out after about six slides, and the longest carousels (16–20) don’t beat the 10–15 range.

Our read: very short carousels rarely give people enough reason to engage. Past about ten slides, you need content that earns every swipe. If you’re unsure, aim for 8 to 12.

Finding 3: Reference posts and how-tos win, stories lag

Every carousel in the library is labelled with one of six formats. Here’s how often each format reached 2× its creator’s usual:

• Reference (cheat sheets, guides, glossaries): 40%, though from a smaller sample of 89 posts
• How-to: 27%
• List: 26%
• Opinion: 24%
• Story: 22%
• Case study: 22%

List carousels are by far the most common, about half of all the carousels we label, and they still beat most formats. Reference posts are rarer but outperform when they land, probably because people save what they want to come back to.

That doesn’t make stories a bad choice. Some of the biggest outliers in the library are stories. It means a story has to be genuinely good, while a useful list or how-to has a higher floor. See how each one is built: list, how-to, story, opinion and case study.

Finding 4: Some niches break out more often

Share of carousels reaching 2× their creator’s usual, by niche:

• Food & cooking: 32%
• Education: 30%
• Productivity: 28%
• Design: 27%
• Personal finance: 27%
• Content creation: 25%
• History & culture: 25%
• Psychology: 24%
• AI & tech: 24%
• Lifestyle & travel: 24%
• Business: 23%
• Health & fitness: 21%
• Fashion & beauty: 18%

Practical, save-worthy niches (recipes, explainers, systems) produce outliers most often. Fashion and beauty, where carousels compete with an endless supply of visual content, produce the fewest. If you’re in a harder niche, borrowing a format from an easier one is a good way in: a recipe-style “here’s exactly how” structure works for almost any topic.

Finding 5: Short, specific first slides do better

We transcribed the first slide of 3,075 of these carousels:

• 6–10 word first slides reached 2× most often (25%), against 17% for five words or fewer.
• First slides with a number reached 2× 24% of the time, against 20% without.
• All-caps first slides beat their creator’s usual less often (42% against 49%).
• Questions beat their creator’s usual less often (39% against 48%).

The full breakdown, with real examples, is in 10 hook patterns from carousels that outperformed.

What I’d do with this

1. Default to 8–12 slides. Long enough to deliver something real, short enough to finish.
2. Lead with a list, how-to or reference post when you’re testing a new idea. They have the highest floor.
3. Keep the first slide to 6–10 words, in normal case, with a number if it’s honest.
4. Judge every post against your own usual, not someone else’s numbers. A 3× post on a small account is a real signal.
5. Steal formats from other niches. The patterns that break out in food and education travel well.

Method and limits

• Score: likes + comments divided by the median likes + comments of up to 20 of the same creator’s carousels, chosen as the ones posted closest in time. At least seven comparison posts are required.
• Excluded from comparisons: paid partnerships, giveaways, posts with comments turned off and posts under a week old.
• What it doesn’t measure: reach, saves and shares aren’t public, so they aren’t included.
• Formats and niches are assigned automatically from each carousel’s text and checked by hand when unclear.
• Sample: creators who post carousels regularly, tracked by Top Carousels. Results may differ for brands, very small accounts or niches we don’t cover.

The numbers above are a snapshot from October 2026. The live library keeps growing as new carousels are collected and scored.

Frequently asked questions

How many slides should an Instagram carousel have?

Aim for 8–12. In our sample, 28% of carousels with 11–15 slides reached 2× their creator’s usual, against 16% of 2–3 slide carousels. Gains flatten after about six slides, and 16–20 slides did no better than 10–15.

What type of Instagram carousel performs best?

Reference posts (cheat sheets and guides) reached 2× their creator’s usual most often (40%, from a smaller sample), followed by how-to (27%) and list (26%) carousels. Stories and case studies reached 2× 22% of the time.

Which niches get the most viral carousels?

Food & cooking (32% reached 2×), education (30%) and productivity (28%) produced outliers most often in our sample. Fashion & beauty produced the fewest (18%).

How was this study done?

We scored 7,394 carousels from 253 creators, dividing each one’s likes + comments by the median of up to 20 carousels from the same creator posted closest in time. Formats and niches were labelled from each carousel’s text.