How to Give a TED-Style Talk: One Idea in 18 Minutes or Less
A TED-style talk explains one idea, and only one, in 18 minutes or less, which is the length TEDx rules describe as typical. Write the idea as a single sentence, build the talk as a path from what the audience already believes to your idea, open with a specific moment rather than an introduction, and rehearse until you know it well enough to say it naturally, whether or not you memorise every word.
Find the one idea
Most failed TED-style talks are about a topic, not an idea. "Sleep" is a topic. "Teenagers aren't lazy; school starts at the wrong time for their bodies" is an idea. The test: can you say it in one sentence of 15 words or fewer, and would some people in the audience disagree with it before your talk?
| Topic (too broad) | Idea (talk-sized) |
|---|---|
| Climate change | My town cut flooding by digging up a car park, not building a wall |
| Kindness | Asking strangers for small favours makes them like you more |
| Boredom | Kids who are allowed to be bored invent their own games, and that's a skill |
| Failure | Our team celebrates killed projects, and it made us faster |
These are made-up examples. The idea should come from your own work or life; that's what makes it yours to give.
Know the format's limits
The TEDx rules say talks are typically under 18 minutes and usually given by one speaker. They also say speakers can't promote their own products, books or businesses, or their employer's, and they rule out talks with an inflammatory political or religious agenda. Many TEDx events give speakers less than 18 minutes, so ask your organiser for your exact slot.
Even outside TEDx, the 18-minute ceiling is a useful discipline: it forces you to cut everything that doesn't serve the idea.
Build the talk as a path
Think of the talk as walking the audience from where they are now to your idea, one step at a time. A structure that works for 10–18 minutes:
| Part | Time (15-minute talk) | What it does |
|---|---|---|
| Opening | 1–2 min | A specific moment, image or question that makes the problem real |
| Where we are | 2 min | What most people believe now, said fairly |
| The turn | 2 min | The moment you saw it differently |
| Building the idea | 6–7 min | Two or three steps of evidence, story or explanation, each building on the last |
| What changes | 2 min | What the idea means for the people in the room |
| The close | 1 min | The idea, said simply one last time |
Every section should move the audience one step forward. If you can remove a section and the path still works, remove it.
The opening
Don't start with "Hi, I'm…, and today I want to talk about…". The host introduces you. Start inside a moment.
Example opening (made-up):
"Last summer my eight-year-old came to me on the third day of the holidays and said the worst sentence a parent can hear: 'I'm bored.' I did what I always do. I reached for my phone to find him something to do. And then I stopped."
It's specific, it's a little uncomfortable, and the audience wants to know what happened next. More examples are in how to start a speech.
Memorise it, or know it?
This is the biggest decision TED-style speakers face. Both can work.
| Approach | Good for | Risk |
|---|---|---|
| Memorise word for word | Very short talks, speakers who rehearse many times | Sounds recited; one lost word can freeze you |
| Know it by sections | Most speakers, especially for 10+ minutes | Takes more runs before it flows |
| Mix | Most common | Memorise opening, close and transitions; know the rest |
If you memorise, rehearse until you're past the stage of remembering, where you're thinking about the words, to the stage where you can think about the audience while you speak. That usually takes many full runs. If you know it by sections, write a one-line summary of each section and practice moving between them until the transitions are automatic. The guide on memorising or using notes goes deeper.
Rehearsal plan
- Write it out in full, then read it aloud and cut anything that sounds written: long sentences, "furthermore", lists of five.
- Run it out loud daily for the last two to three weeks, timed.
- Rehearse to different people: someone who knows the subject and someone who doesn't. Ask each to say your idea back to you.
- Rehearse standing on a marked spot. Some stages mark the spot you're meant to stay on, so practice not wandering.
- Record one run on video and watch for pacing, filler words and wandering.
Speaking Coach can help with short daily runs: speak a section to an AI audience and get your pace in words per minute, filler words and long pauses, then retry the part that dragged.
Slides, or none
Many good TED-style talks use few slides or none. If you use them, use full-screen images, a single word, or one number. Never a slide of bullet points. Ask the organiser whether there's a clicker and a confidence monitor.
Mistakes to avoid
| Mistake | Why it hurts | Instead |
|---|---|---|
| Three ideas in one talk | None lands | Pick one; save the others for another talk |
| A résumé opening | The host already introduced you | Start in a moment |
| Selling something | Breaks the TEDx rules and the audience's trust | Share the idea; let people find you afterwards |
| Ending on "Thank you for listening" alone | Weak final beat | End on your idea, then thank them |
| Running over the slot | Talks over 18 minutes face extra review | Rehearse to finish under time |
Questions people ask
How long is a TED talk?
TEDx rules describe talks as typically under 18 minutes. Many events set shorter slots, so check yours with the organiser.
Do TED speakers memorise their talks?
Some do, some don't. What matters is knowing it well enough to speak naturally; many speakers memorise the opening, close and transitions and know the rest by sections.
Can I use notes in a TEDx talk?
It depends on the event, and some stages have a confidence monitor. Even so, aim to need nothing more than a glance.
What makes a good TED talk idea?
One idea you can say in a sentence, that comes from your own experience or work, and that some of the audience don't already believe.
How do I get a TEDx talk?
Look for TEDx events near you and follow each event's own speaker application process, which differs by organiser. Have your one-sentence idea ready.