TEDx Talk Length: What TED Says About 18 Minutes
Speakers & timekeeping8 min readUpdated
TED's current TEDx rules say that TEDx talks are "typically under 18 minutes and most often delivered by a single presenter", that many are shorter ("3-9 minutes being ideal for a focused idea"), and that a longer format of up to 30 minutes may suit dynamic interviews or dialogues between two speakers. Any talk over 18 minutes is subject to review by the TEDx team before it is published on the TEDx YouTube channel. So 18 minutes is a ceiling, not a target, and for most speakers the right length is shorter.
What the official TEDx guidance says, word for word
The rules and organizer guide on ted.com (checked 16 October 2026) state:
- The norm: "TEDx talks are typically under 18 minutes and most often delivered by a single presenter." (TEDx Rules)
- Shorter is welcome: "Many talks are even shorter, with 3-9 minutes being ideal for a focused idea." (TEDx Rules)
- The exception: "In some cases, a longer format of up to 30 minutes may be appropriate", for example dynamic interviews or dialogues between two speakers. (TEDx Rules)
- Publishing: "any talk exceeding 18 minutes will be subject to review by the TEDx team before being published to the TEDx YouTube channel" (TEDx Rules, Uploading Talks section), and any videos submitted outside these formats "may not be published on the TEDx YouTube channel" (TEDx Rules, Event Basics section).
- No panels, no audience Q&A: "No panels or audience Q&A are permitted." (TEDx Rules)
- The classic format: "One speaker, one idea, delivered in 18 minutes or less – with or without slides." The same page calls 18 minutes "the traditional length for TED and TEDx talks" and notes that "5-8 minutes is common for concise, focused ideas." (Select ideas and speakers)
TED's older, undated TEDx Speaker Guide was stricter. It asks "can I go over 18 minutes?" and answers "No", adding that "Shorter talks are not lesser talks." The current rules leave room for the 30-minute interview or dialogue format, so treat the current rules page as the authority, and check it again before your event, since TED updates it.
For organizers: how to time a TEDx session
Give every speaker a specific number
The TEDx organizer guide says "Your speaker should know how many minutes they have for their talk", and that the script should fit the slot (Prepare speakers and program). Don't just say "18 minutes max". Assign each speaker a length that suits their idea (6, 10, 12, 15 minutes) and put it in writing. A speaker told "up to 18" will usually use all 18.
Build sessions with TED's own numbers
The same guide says most organizers run 90-minute sessions with "four full-length talks and a few short presentations", recommends padding each session with an extra 15 minutes, and says not to make a session longer than 105 minutes. Host introductions should be about 30 seconds.
Here is one way those numbers fit together. The talk lengths and changeover times are an example, not a TED requirement:
| Item | Time |
|---|---|
| Host welcome | 3:00 |
| Intro (0:30) + Talk 1 (18:00) | 18:30 |
| Intro + Talk 2 (15:00) | 15:30 |
| Performance or short video | 6:00 |
| Intro + Talk 3 (15:00) | 15:30 |
| Intro + Talk 4 (12:00) | 12:30 |
| Intro + short talk (6:00) | 6:30 |
| Host close | 2:00 |
| Changeovers and applause (7 at about 1:30) | 10:30 |
| Planned content | 90:00 |
| Padding | 15:00 |
| Session on the schedule | 105:00 |
Because TEDx has no audience Q&A, there's no Q&A slot to absorb an overrun. The padding is your only buffer, so protect it: if Talk 1 runs 4 minutes long, that's 4 of your 15 minutes gone before the session is a third done. The run of show guide covers how to track this through the day.
Decide the cue before the dress rehearsal
TED's rehearsal guidance lists "How you will cue them when their time runs out" among the things to settle with each speaker, and describes the host as the person who "enforces time limits and encourages quick transitions" (Prepare speakers and program). TED doesn't prescribe a method, so pick one and use it for every speaker:
- A countdown on a confidence monitor at the front of the stage, showing time remaining. The speaker guide expects speakers to rehearse "with the clicker and the confidence monitor". Placement and sizing are covered in confidence monitor vs podium timer.
- A colour change near the end. TED's own older web-based countdown timer switches to a second-by-second display at 90 seconds and, if the speaker goes over, turns red, flashes "OVER TIME" and counts up (TED Countdown). Whatever timer you use, tell each speaker what changes and when.
- A final-minute signal from a person, such as the stage manager in the wings, for speakers who don't look down.
Then agree what happens if someone keeps going. The polite escalation, with host lines you can borrow, is in how to stop speakers from running over time.
If you run the timer in StageClock, make each talk its own segment with that speaker's exact length. The colour changes are fixed at 50% and 10% of time remaining, so an 18-minute talk turns yellow at 9:00 left and red at 1:48 left, and a 10-minute talk at 5:00 and 1:00. Tell speakers those points in the dress rehearsal. The "Wrap Up Now" quick message appears on the Speaker Monitor, not on the Stage Display, so use the Speaker Monitor as the confidence monitor if you want speakers to see messages.
For speakers: rehearsing to a TEDx limit
TED expects TEDx speakers to rehearse a lot. The organizer guide's sample timeline starts rehearsals about four months out, moves to weekly rehearsals a month out, includes a week off two weeks before, and ends with dress rehearsals one or two days before the event (Prepare speakers and program).
The speaker guide's timing advice is short: "Time yourself. Practice with the clock winding down in front of you. Do it until you get the timing right every time."
In practice:
- Write to your assigned length, minus a margin. If you've been given 12 minutes, aim for a run that comes in around 11. Live laughter and applause add time.
- Time full runs out loud, standing. Note where you are at three or four checkpoints, so you can tell mid-talk whether you're on pace.
- Have a cut ready. Know which story or example goes if you're behind at your middle checkpoint.
- Rehearse with the actual countdown at the dress rehearsal, on stage, so you know where to look and what the colour or cue changes mean.
How to time a talk has the method for measuring your speaking rate, setting checkpoints and recovering on stage.
The organizer guide also describes a "timed slides" format, where a speaker has to land their idea within a set limit while slides advance automatically. If you're invited to do one, rehearse with the auto-advancing deck itself: your timing has to match the slides, not the other way round.
Frequently asked questions
Does the host's introduction count toward the speaker's time?
TED's guidance doesn't say. It describes introductions as part of the host's role and suggests they run about 30 seconds. Our suggestion, not a TED rule: treat the intro as the host's time and start the speaker's countdown when they begin speaking. Tell the speaker this in advance so there's no confusion about when the clock started.
What if a talk comes in under the assigned time?
That's fine, and often better. TED's own pages say some of the most impactful talks have been 5 minutes long. For organizers, an early finish simply returns time to the session padding.
Key takeaways
- TED's current rules: TEDx talks are typically under 18 minutes, 3 to 9 minutes is ideal for a focused idea, and interviews or dialogues can run up to 30 minutes.
- Talks over 18 minutes are subject to review by the TEDx team before they are published on the TEDx YouTube channel.
- Give each speaker a specific length, and build 90-minute sessions with 15 minutes of padding and none over 105 minutes, as TED's organizer guide suggests.
- There's no Q&A in TEDx, so overruns come straight out of your padding.
- Agree the time cue with every speaker before the dress rehearsal and rehearse with it on stage.