On Instagram and LinkedIn, a carousel is a single post made of several slides that people swipe through, instead of one image. Instagram allows up to 20 photos or videos in a carousel as of Nov 2026, according to Sprout Social.
The word works a little differently on each platform, and LinkedIn's version catches people out. Sources here are Sprout Social and Hootsuite, both social media software companies, plus Wikipedia for the dates.
Swipe on the app, click on desktop
Hootsuite says people using the app swipe left to move through a carousel, while people on a desktop click an arrow on the right of the post. Either way, it's one post in the feed, not several.
From ten slides to twenty
Wikipedia says Instagram allowed up to ten pictures or videos in one swipeable carousel post from February 2017. Sprout Social says Instagram later raised that to 20. Limits like this change, so check the app before you plan a long one, and there's more detail on Instagram's 20-photo limit if you need it.
On LinkedIn, it's usually a PDF
This is the bit most people miss. Hootsuite describes a LinkedIn carousel as a swipeable multi-slide post that is, in practice, an uploaded PDF document. So making one means building your slides as a PDF, and this walk-through on posting a carousel on LinkedIn covers the steps.
LinkedIn also has carousel ads, which Wikipedia says launched in 2018, using swipeable cards that each carry their own image, headline and description. So on LinkedIn, carousel can mean a document post or a paid ad format, and it's worth asking which one somebody means.
Do carousels get more engagement?
Sprout Social cites influencer carousels averaging a 1.36 percent engagement rate against 1.04 percent for single images, from stats it links to. That's one company's summary of someone else's figures, for influencer accounts, so I'd treat it as a hint, not a promise for your account.
Carousel questions answered
What is a carousel post on Instagram?
One post with up to 20 photos or videos you swipe through.
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How many slides can a carousel have?
Up to 20 on Instagram per Sprout Social and Hootsuite; it was ten when launched in 2017.
What is a LinkedIn carousel?
A swipeable multi-slide post, usually an uploaded PDF.
What does carousel mean in a dictionary?
A merry-go-round, a revolving luggage belt or a slide projector tray.
Worth making one?
If you've got more to say than one image can hold, yes. A carousel keeps a set of slides together as one post, which suits step-by-step tips, before-and-afters and short stories. On LinkedIn, just remember you're making a PDF.
Off the screen: the other carousels
Outside social media, Dictionary.com defines a carousel as a merry-go-round, a revolving belt such as an airport baggage carousel, or a circular slide-projector tray. All three go round, which is roughly the feeling of swiping through slides. It's not the only ordinary word with a special meaning on a profile, either: your bio is another.
