How many words for a 5, 10 or 15 minute presentation
Speaking at a comfortable pace for an audience is about 130 words a minute, so a five-minute talk is roughly 650 words, ten minutes about 1,300, and fifteen minutes about 1,900. Slides follow the same clock at roughly one per minute for a talk: five, ten and fifteen minutes take about 5–7, 10–12 and 14–18 slides including the title. Both numbers are ceilings — every question, pause and demonstration spends from the same budget.
This guide gives the numbers, what changes them, and the rehearsal that turns an estimate into a talk that ends on time.
The table
| Length | Words at ~130 wpm | Slides (talk) | Slides (teaching pace) |
|---|---|---|---|
| 3 min | ~390 | 3–4 | 2–3 |
| 5 min | ~650 | 5–7 | 3–4 |
| 10 min | ~1,300 | 10–12 | 5–7 |
| 15 min | ~1,950 | 14–18 | 7–10 |
| 20 min | ~2,600 | 18–22 | 9–12 |
The two slide columns matter. A conference talk moves at about a slide a minute; a lecture moves at one slide per two or three minutes because it stops for examples, questions and the board. The lecture slide counts cover the teaching case, and the slide-count calculator does the arithmetic for any length.
What moves the number
- Pace. 100 words a minute is deliberate, 150 is brisk, above 160 the audience stops following. Nervous speakers run fast; recorded lectures run slower than live ones.
- A second language. For the speaker or the audience, plan 10–20% fewer words.
- Equations and code. A slide that is read silently by the audience while you explain costs two or three minutes and almost no words.
- Questions. If questions come during the talk rather than after, budget a quarter of the time for them.
- The demo. Whatever it takes when it works, plus the time it takes when it does not.
If you write the talk out
Writing the script is a good way to find the length; reading it aloud is not a good way to deliver. Two uses for a written text:
- Count words to see whether the plan fits before you build the deck.
- Write the first and last minute verbatim — the opening and the conclusion are where nerves do the most damage — and leave the middle as notes.
The script belongs in the speaker notes, not on the slides.
Rehearse against the clock
- Run it once, aloud, standing, with a timer. Silent reading is 30–50% faster than speaking and will lie to you.
- Note where you are at the halfway mark. If you are behind at the midpoint you are behind at the end; speeding up does not recover it.
- Mark two slides as droppable — an example and an aside. When you are three minutes over, you drop them without rewriting the ending.
- Never rehearse the ending only in your head. It is the part you will need to deliver on autopilot.
When it is too long
In this order: cut a section rather than trimming every slide; move detail to a backup slide after the conclusion, for questions; shorten the setup (audiences need less background than speakers think); and leave the conclusion alone — an overrun that eats the conclusion costs more than the material you were protecting.
In Lecture Studio
Lecture Studio writes speaker notes alongside the deck, so the word count of a session is visible before you rehearse; for a fixed-length talk that is the fastest check that the plan fits. The app is free during the beta and needs an Oberik project key.
FAQ
How many words is a 10 minute presentation?
About 1,300 at a comfortable 130 words a minute — between 1,000 and 1,500 depending on pace and pauses.
How many slides for a 15 minute presentation?
About 14–18 for a conference-style talk, fewer if slides carry equations or figures the audience needs time to read.
How many words per minute should I speak?
120–150 for a presentation. Below 100 sounds laboured, above 160 is hard to follow, especially for non-native speakers.
Does a Q&A count in the time limit?
Usually it is separate, but check — a "15-minute slot" often means 12 minutes of talk and 3 of questions.