Instagram allows up to 20 slides per carousel, but most carousels that get read all the way through have 5 to 10. The right number is the smallest one that fits your idea: one hook, one slide per point and one call to action. If you could delete a slide without losing anything, delete it.
Why "as many as the idea needs" beats a fixed number
Every extra slide is another chance for the reader to stop. That doesn't make long carousels bad. A 12-step process deserves 14 slides. It means each slide has to earn its place by delivering one complete point, not by stretching a point across two cards.
A quick test: read each slide on its own. If it makes sense and says something new, it stays. If it only works as half of the next slide, merge them.
A length for each type of carousel
| Carousel type | Typical slides | Shape |
|---|---|---|
| Single myth or tip | 4 to 5 | Hook, the myth, why it's wrong, what to do, call to action |
| List ("5 mistakes...") | 7 | Hook, context, five points, call to action |
| Step-by-step process | Number of steps + 3 | Hook, one slide per step, summary, call to action |
| Before and after or comparison | 5 to 6 | Hook, the before, the after, why it changed, call to action |
| Story | 6 to 8 | Hook, setup, turning point, result, lesson, call to action |
The slides every carousel needs
Whatever the length, three slides are non-negotiable:
- The hook. It decides whether anyone sees slide two. Make a specific claim, call out who it's for or promise a concrete payoff.
- The points. One per slide. A numbered layout ("3 of 5") tells readers how far they are, which makes them more likely to finish.
- The call to action. One specific ask at the end: save it, comment, share it or send you a DM.
Here's what makes each of those slides work.
Count your slides before you design
Write the text for every slide as a plain list first. It's far easier to cut a weak slide from a list than from a finished design. Once the list feels tight, set your canvas to 1080 × 1350 pixels and design.
Let the length follow the idea
Kohapu plans each carousel slide by slide before it designs anything, so the number of slides comes from the idea itself: a quick myth gets a short carousel, a process gets one slide per step. Every carousel opens with a hook and ends with a call to action written for that specific post. You approve, edit or skip each one before it's published.