Guides · 6 min read
How many slides do you need for a presentation?
There is no magic number, but there are good ranges. The right count depends on how long you have, what kind of talk it is, and whether people will read the slides or watch you present them. Here is how to decide.
The short answer
For a spoken presentation, a common starting point is about one slide for every one to two minutes. A 10 minute talk lands somewhere around 5 to 10 slides. A 30 minute talk sits around 15 to 25.
Treat that as a sanity check, not a rule. A slide with one photo and a single line might be on screen for 20 seconds. A detailed chart you walk through might stay up for four minutes. What matters is that each slide earns its time.
Slide counts by length
As a rough guide for talks you deliver in person or on a call:
- 5 minutes: 3 to 6 slides. One message, one example, one ask.
- 10 minutes: 5 to 10 slides.
- 15 minutes: 8 to 15 slides.
- 20 minutes: 10 to 20 slides.
- 30 minutes: 15 to 25 slides.
- 45 to 60 minutes: 25 to 40 slides, with natural breaks for questions.
Slide counts by type of presentation
Investor pitch decks usually run 10 to 15 slides, with extra detail in an appendix. Guy Kawasaki's 10/20/30 rule, 10 slides in 20 minutes with no font smaller than 30 points, was written for exactly this situation and is still a useful limit.
Sales and proposal decks tend to sit between 10 and 20 slides. Keep the core story short and move case studies and pricing detail to the back.
Business reviews and board packs are often longer, because they are read as much as presented. 20 to 40 slides is normal, but a clear summary at the front matters more than the total.
Lectures and training sessions can run longer still, often one slide every two or three minutes, because each slide holds a concept the audience works through.
Pecha Kucha is a fixed format created by the architects Astrid Klein and Mark Dytham: exactly 20 slides, each shown for 20 seconds. Ignite talks use a similar idea with 20 slides that advance every 15 seconds. If you are invited to one of these, the count is decided for you.
Presented decks versus read decks
A deck you present can be sparse, because you supply the detail out loud. Big images, single numbers and short titles work well, and you might use more slides to keep the pace up.
A deck that will be emailed and read alone needs to stand on its own. Each slide carries more words and more evidence, so you usually need fewer, denser slides. Consultants often call this a reading deck.
Many people need both. A simple approach is to build the presented version first, then add a short appendix or speaker notes for readers.
Webinars and video calls sit somewhere in between. Screens are smaller and attention drifts faster when people are at their desks, so it often helps to change the slide a little more often than you would in a room, keeping each one simple. Many people also share the deck afterwards, which is another reason to make the titles carry the message.
How to find your own number
Work from your message rather than from a target count.
- Write down the three to five points your audience must remember.
- Give each point one slide for the claim and one or two for evidence.
- Add an opening slide, an agenda if the talk is long, and a closing slide with the ask.
- Rehearse with a timer. If you run over, cut evidence before you cut points.
- Move anything you are keeping just in case into an appendix.
Signs you have too many slides
You find yourself clicking through slides saying we can skip this one. Several slides make the same point. You need a slide to explain your agenda for the other slides. Or your rehearsal regularly runs over and you speed up at the end, which is when the audience is meant to hear your conclusion.
Too few slides has its own symptoms: walls of text, charts squeezed into corners and slides that stay up so long people stop looking. If a slide carries more than one message, split it.
Letting the content set the count
If you are starting from a document, PPTlover reads it and recommends a slide count based on how much content there is. If you choose fewer slides than the material needs, it tells you rather than silently cutting detail, so you can decide whether to shorten the story or keep the evidence.
Each slide costs 10 credits at 2K or 15 at 4K, and your first slide is free, so you can test the length and style before committing to the full deck.