How long should a class presentation be?
An informative class presentation is usually 5 to 10 minutes long, about 650 to 1,300 words at 130 words per minute. Your teacher's limit always wins: if the assignment says 5 to 7 minutes, write about 650 to 910 words and rehearse with your slides.
That's 5 min to 10 min, or roughly 650 to 1,300 words at 130 words per minute.
Why this length works
Teachers set presentation lengths so everyone in the class gets a turn, and 5 to 10 minutes is a common window for individual informative talks. It is long enough to explain a topic properly with examples, and short enough that a whole class can present over a few lessons.
Timing is often part of the grade, so finishing well short or long can cost marks even when the content is good. Rehearsing out loud with your slides is the only reliable way to know your real length, because reading silently is much faster than speaking.
How to structure a 7 min 30 sec class presentation
Introduction
~145 words
1 min 8 sec · A hook, your topic, and a quick preview of your main points.
Main points
~685 words
5 min 15 sec · Usually two to four sections, each with an explanation and an example, fact, or image.
Conclusion
~145 words
1 min 8 sec · Recap the key points and end with one takeaway, then invite questions if allowed.
Tips
- Check the rubric for timing rules, and ask whether questions count toward your time.
- Plan roughly one slide per minute, and keep each slide to a few words or one image.
- Rehearse out loud with a timer at least twice. Reading silently takes far less time than speaking the same words.
- Write notes as short prompts, not full sentences, so you look at the class instead of reading.
- For group presentations, divide the time before you divide the slides, so one person does not take half the slot.
Common mistakes
- Reading the slides word for word to the class.
- Packing in so much information that you rush the last few slides.
- Practicing silently and discovering on the day that it runs nearly twice as long.
- Skipping the conclusion and ending with 'that's it.'
Example opening lines
- “By the end of the next seven minutes, you'll know why your phone battery gets worse every year, and what you can do about it.”
- “Raise your hand if you've ever wondered how a plane that weighs hundreds of tons stays in the air.”
- “My topic today is the honeybee, and I want to start with a question: what would your breakfast look like without them?”
Time your speech
Paste your draft to check its length at your pace, then rehearse it in the teleprompter.
Or type a number of words
Speaking time at 130 wpm
7 min 30 sec
975 words · about 4 pages double-spaced
| Pace | Time |
|---|---|
| Slow 110 wpm | 8 min 52 sec |
| Presentation 130 wpm | 7 min 30 sec |
| Conversational 150 wpm | 6 min 30 sec |
| Voice-over 160 wpm | 6 min 6 sec |
| Fast 180 wpm | 5 min 25 sec |
| Reading aloud, average 183 wpm | 5 min 20 sec |
| Silent reading 238 wpm | 4 min 6 sec |
Measure your own pace
Paste a script above (Words → time), press Start, read it aloud at your normal delivery, then press Stop. Nothing is recorded; this only times you.
Rehearse it
Open your script in the free teleprompter. It scrolls at the words-per-minute pace you choose and can record an audio take.
Frequently asked questions
How many slides do I need for a 5-minute presentation?
Around 5 to 7, roughly one per minute plus a title and closing slide. Fewer, simpler slides work better than many crowded ones.
How many words is a 5-minute presentation?
About 650 words at 130 words per minute, a clear presentation pace that leaves room for pauses and slide changes.
What if my presentation is too short?
Add an example, a short story, or a visual to your weakest point rather than speaking more slowly. Then rehearse again with a timer.