How many slides should a presentation have? Plan from minutes, not habit

These ranges assume a business audience, one message per slide and part of the slot kept for questions. Use the low end for dense slides with charts and the high end for light ones.

The slides, words and minutes per slide are what the slide count calculator returns for a business update at a steady pace. “Time to talk” is the slot minus the minutes kept for questions: none in the 5-minute slot, then 2, 3, 5, 10, 15 and 20 minutes. The word counts use 130 words a minute, the normal pace in the speaking time calculator, and about a tenth fewer fit if you count pauses.

How many slides for a 5 minute presentation?#

Three to five, with four as a default. A 5-minute slot leaves no time for questions, so you talk for all five minutes: show the answer, one or two reasons and the ask. That is about 1.3 minutes per slide. Skip the agenda, because the summary does its job.

How many slides for a 10 minute presentation?#

Five to seven. Keep about two minutes for questions, so you talk for eight, and plan one slide for every one to two minutes. Six slides is a good default: a title, a summary with the answer, three reasons with one slide each, and the ask.

How many slides for a 15 minute presentation?#

Seven to ten, with eight as a default. With three minutes kept for questions you talk for twelve minutes, which is 1.5 minutes per slide. That carries three reasons with one or two slides each, framed by the summary and the ask.

How many slides for a 20 minute presentation?#

Eight to twelve, with ten as a default. With five minutes kept for questions you talk for fifteen, which is about 1.5 minutes per slide. Kawasaki's 10-20-30 rule also names ten slides and at most 20 minutes, which is two minutes per slide.

What if your slot is not in the table?#

For a slot that is not in the table, the formula is short: divide the minutes you will talk by 1.5 and round down. With 14 minutes to talk, that gives 9 slides. Treat the number of minutes itself as a ceiling, so 14 minutes never take more than 14 slides.

Enter your own slot and the minutes you keep for questions to get the number of slides, a range and a minute plan.

Count minutes first and slides second. Build the budget from the end:

Here is the arithmetic for a 20-minute slot with 5 minutes of discussion:

That is ten slides at 1.5 minutes each on average. A shorter slot trims the evidence, not the messages: in 10 minutes, with 8 to talk, the same skeleton is six slides, a title, the summary, one slide for each of the three reasons and the ask. A longer slot adds proof, not messages. The guide to structuring a presentation explains the skeleton.

The example quarterly review below has six slides: a title, three slides of evidence, the plan and the ask. At 1.5 to 2 minutes for each content slide it takes about 8 to 10 minutes to present, so it fits a 15-minute slot with time for questions. The deck is on the quarterly business review page.

As a ceiling, yes. As a target, usually not. The published rules disagree by a factor of six, because they describe different kinds of talk:

Which one is right depends on what each slide carries. A slide with one number takes 20 seconds, while a waterfall chart that needs explaining takes two to three minutes. So budget by slide type, not by an average. The figures below are planning allowances, not measurements, and one timed run-through will correct them.

At 1.5 to 2 minutes each, the ten slides of the example pitch deck take 15 to 20 minutes, which is where Kawasaki's rule lands.

What is the 10/20/30 rule?#

Guy Kawasaki's rule for pitches: ten slides, at most twenty minutes and no type smaller than 30 points. For a 10 minute slot it points to 5 slides at 2 minutes each. The full rule and its limits are in the presentation rules guide.

Yes. With two minutes kept for questions, seven slides give you just over a minute each for eight minutes of talking. What matters is that each slide carries one message and that the ask comes before the last third of your slot.

What is the 7-7-7 rule?#

The 7-7-7 rule limits how much text a slide holds, usually seven lines of seven words, and says nothing about how many slides you show. Some versions also cap the deck at seven slides, so say which version you mean. The presentation rules guide shows where it helps and where it misleads.

Count the slides you will show. The title slide counts but takes seconds. Skip the agenda in a short deck, because the summary does its job, and skip the thank-you slide, because the last slide you show should hold the ask.

Appendix and backup slides do not count toward your time, since you show them only when someone asks. They do count when you send the file, so put a divider titled “Appendix” after the last slide and mention on the summary that the appendix exists.

If the slot might be cut, mark in your notes which slides you would skip, and make sure the ask comes before them.

Then the limit is the reader's patience, not your minutes. A deck read on a screen can hold more per page and run longer, as long as the first pages answer the question and every title states its point. That is the idea of a pre-read: the reader gets the argument in advance, so the meeting can go to the decision.

Cut by relevance instead of by time: a page that proves no title goes to the appendix. If the audience is senior and short of time, the guide to presenting to executives shows how to lead with the recommendation and keep the detail behind it.

Cut in this order:

Do not fix a long deck by speaking faster or shrinking the font. Both move the problem to the audience.

AI can draft a deck of any length, so the number it chooses is the number you ask for. Give the slot and the question time in your brief, name the count you worked out, and ask for an appendix for the rest.

In the plan, check the page count against your minute budget. Ask for speaker notes and the AI writes them into the PowerPoint file, so request them if you want a time per slide.