PostEaseThe short answer
A carousel post is a single post that holds several images or videos, which people swipe through one after another. Instagram, Facebook, TikTok (as photo posts) and LinkedIn (as document posts, often PDFs) all have a version. Carousels suit anything with steps or a sequence: a how-to, a list, a before and after, a short story told frame by frame.
In Buffer’s 2026 engagement report, carousels had the highest median engagement rate of any format on Instagram (6.90% of reach, against 3.31% for Reels) and on LinkedIn (21.77%). Reels, by contrast, reached more people, so Buffer treats carousels as the format for engagement and Reels as the format for reach.
Instagram’s carousel rules
Instagram’s Help Center sets out what a carousel can hold and how it behaves:
| Rule | What Instagram says |
|---|---|
| How many | You can share a post with up to 20 photos and videos as a single post, also known as a carousel |
| Shape | You can’t select a different orientation for each photo or video. |
| Videos inside | videos in carousels are not considered reels and will not show up in the Reels tab or have reels features |
| After posting | While you can’t add new photos or videos after you’ve shared the carousel, you can delete the post. |
Carousels against other formats
Buffer’s report covers over 52 million posts across 10 platforms. Its engagement rate is engagements divided by reach. Only Instagram and LinkedIn had carousel figures; the other platforms were reported without one.
| Platform | Carousels | Images | Video or Reels |
|---|---|---|---|
| 6.90% | 4.44% | 3.31% (Reels) | |
| 21.77% (document posts) | 6.52% | 7.35% |
What carousels reach
Engagement and reach tell different stories. Buffer found Reels reached about 1.36 times as many people as carousels on Instagram. Measured against followers instead, Socialinsider’s 2026 study of brand accounts found the three Instagram formats close together, with carousels slightly ahead.
| Format | Reach rate |
|---|---|
| Carousels | 4.50% |
| Reels | 4.10% |
| Images | 4.00% |
Why carousels earn engagement
Each swipe keeps someone on the post longer, and a carousel that teaches something is worth saving to come back to. The format rewards content with a reason to keep going: a numbered list, a process, a reveal on the last frame. Content without that sequence, forced into ten frames, tends to lose people after the first.
The pattern is not new. In a separate Buffer analysis of more than 4 million Instagram posts published from 2022 to 2024, carousels earned about 2.09 times the engagement rate of Reels.
The spread is wide. Buffer notes that strong LinkedIn carousels passed 41% engagement while weak ones sat around 5.4%, so the format helps a good idea and does little for a thin one.
How to make a carousel worth swiping
A few habits make the difference:
- Put the promise on the first frame: what the reader gets by swiping.
- One idea per frame, in large type that reads on a phone.
- Make the last frame worth reaching: the answer, the result, or a clear next step.
- Keep the same look on every frame, so the post reads as one piece.
Questions
Do carousels get more engagement than Reels?
On Instagram, yes, in Buffer’s 2026 data: a median of 6.90% of reach for carousels against 3.31% for Reels. Reels reached more people, about 1.36 times as many.
What is a LinkedIn carousel?
A document post, usually a PDF, that LinkedIn shows as swipeable pages. In Buffer’s 2026 report it had a median engagement rate of 21.77%, the highest of any LinkedIn format.
How many slides should a carousel have?
As many as the idea needs and no more. Each frame should earn the next swipe; a five-frame carousel people finish beats a fifteen-frame one they abandon after the second.
Should I post carousels or Reels?
Both, for different jobs. Buffer’s data suggests Reels for reaching new people and carousels for engaging the people you reach, especially with content that teaches in steps.
Sources
- Buffer, The state of social media engagement in 2026, March 2026.
- Socialinsider, Social media reach has a 14% YoY decrease on Instagram, September 2026.
- Instagram, Share a post with multiple photos or videos on Instagram, checked October 2026.