Best Length for YouTube Shorts: The Limit, and How to Find Your Own
The best length for YouTube Shorts is the shortest one that finishes your idea. YouTube sets a ceiling, which is up to 3 minutes as of October 2026, but it publishes no ideal length, and a Short that says what it came to say in 30 seconds gains nothing from being stretched to 60. Any single number you read in a listicle is a guess. What you can do is read your own retention data and let your channel tell you.
This guide covers the limit and where it comes from, why “shorter is always better” and “longer is always better” are both wrong, how to read retention for videos of different lengths, and what changes when you make Shorts in volume. We make Nichecast, a tool that produces Shorts for faceless channels, and it gets one section near the end. The rest works with YouTube alone.
The length limit, according to YouTube
YouTube’s help page for creating Shorts says that its creation tools make it easy to create short-form videos “up to 3 minutes long with our multi-segment camera.” That is the limit for a video you record or upload as a Short. Shape matters too: a Short is a vertical or square video, and a wide 16:9 file is treated as an ordinary video. Our guide to uploading a YouTube Short walks through the rules and the odd cases, such as older uploads that kept the old 60 second cutoff.
So the question has two halves:
- How long are you allowed to go? Three minutes.
- How long should you go? YouTube does not say, and that silence is informative. Its own help pages talk about holding attention, not about hitting a duration.
Why there is no single best length
Three things decide what length suits a Short, and none of them is a number.
- What the idea needs. A single surprising fact needs one beat. A top five needs five. A short story needs a beginning and an end. Cutting an idea below what it needs makes it feel rushed, and padding it makes people swipe.
- Where viewers drop. A longer Short is only better if people stay through the extra time. If most of them leave at second 20, a 45 second Short is a 20 second Short with 25 seconds of nobody watching.
- How you want the video to behave. A very short Short can loop, so a viewer may watch it twice. A longer one tells a fuller story but has to earn every second.
YouTube’s own description of retention backs the general principle. In its audience retention help page it says that “Videos on YouTube generally taper off during the playback period.” Every extra second is a second where some viewers have left. The question is whether what you add is worth the ones you lose.
Common length bands, and what each one suits
These are not rules or targets. They are the shapes most faceless channels fall into, with the kind of content each one tends to carry.
| Band | What fits | Watch out for |
|---|---|---|
| Under 20 seconds | One fact, one visual, one reveal | Having nothing left to say after the hook |
| 20 to 45 seconds | A fact with context, a quick comparison, a three item list | Rushing the payoff to fit |
| 45 to 90 seconds | A short story, a five item ranking, a mini explainer | A slow middle that loses people |
| 90 seconds to 3 minutes | A full explainer, a longer story, a step by step | Retention falling away long before the end |
Pick the band from the idea, then test it. Two channels in the same niche can land in different bands, because their viewers and their formats differ.
How to find your own best length
You have the data already. Here is the method.
- Make a spread. Over a few weeks, publish Shorts of different lengths in the same format and niche, for example a handful around 25 seconds, a handful around 45 and a handful around 70. Keep everything else as close as you can: same kind of hook, same voice, same posting time.
- Open the retention report per video. In YouTube Studio choose Content, pick the video, select Analytics, then look for the Audience retention report on the Overview or Engagement tab.
- Read the shape of the line. YouTube describes it this way: a flat line means viewers are watching that part from start to finish, a gradual decline means viewers are losing interest over time, spikes mean parts are rewatched or shared, and dips mean viewers are abandoning or skipping at that moment.
- Compare like with like. The report lets you compare your video against YouTube videos of similar length, and typical retention compares your 10 latest videos of similar length. Use that comparison rather than judging a 70 second Short against a 20 second one.
- Look for the cliff. If every longer Short loses most viewers at the same point, that point is your natural length, and anything past it needs a reason.
One limit to know about: the key moments part of the retention report, with its intro, top moments, spikes and dips, only appears when a video is at least 60 seconds long and has at least 100 views. So for a Short under a minute you read the plain retention line instead, and for a longer one you get the extra markers.
YouTube also changed what a view means for Shorts. As of October 2026 its help page says views count each time a Short starts to play or replays, with no minimum watch time, and that the earlier measure still exists in Analytics as Engaged views. When you compare lengths, compare engaged views and retention, not raw views, because a very short Short can collect starts that a longer one has to earn.
Make the length fit the idea
Once you know your band, the work is in the script. A few habits help whatever length you land on:
- Write the hook first. The first line decides whether the rest gets watched, and YouTube’s guidance on intros asks whether the opening matched what the title and thumbnail promised.
- Put the best moment early. YouTube’s own advice on top moments is that if they come late, you should consider introducing the compelling content earlier, because audience size typically decreases over the length of the video.
- Cut every sentence that does not change what the viewer knows. Read the script aloud and drop the line you would skip as a viewer.
- Write to the spoken pace. A voiceover runs at the speed of speech, so word count sets the duration. Time one read of your script before you record anything.
Our guide to writing a script for a YouTube video covers the structure in more detail, and the post on how often to post YouTube Shorts covers the other half of consistency.
When picking a length by hand is enough
If you post two or three Shorts a week, you do not need a system. Make each one as long as it needs to be, glance at the retention line a few days later, and adjust the next one. Testing lengths is a habit for channels with enough volume to compare, and a small channel can learn plenty from reading its ten latest videos.
When you make Shorts in volume
The length question gets harder at one Short a day, because every video needs a length decision and a retention check, and the numbers only mean something across many videos of one format.
Nichecast is built for that case. You describe a faceless channel once: its niche, its video type and its voice. Each time you press Generate, it writes the script, records the voiceover, adds captions and renders a finished vertical video, then uploads it to your own YouTube Studio as an unlisted draft. It never publishes, so the review and the final call on each Short stay with you.
On length, here is what we can say. The length of a Nichecast video follows its narration, so the script sets it. The two sample videos on the Nichecast home page run 62 seconds and 39 seconds as of October 2026, so you can see real output at two different lengths. We do not claim a best length for you. The point is that a consistent format gives you comparable videos, and your retention data tells you what to change.
As of October 2026 the pricing page lists:
| Plan | Price | Videos |
|---|---|---|
| Free | $0 | 5 videos to start, once |
| Pro | $29 a month | 30 videos a month |
A video that fails is refunded automatically. The free five are enough to see whether the lengths and the style suit your channel: start here.
The short answer
Use the shortest length that finishes your idea. YouTube’s ceiling for a Short is 3 minutes, and it publishes no ideal length. Find yours by publishing a spread of lengths in one format, reading each video’s audience retention in YouTube Studio, comparing against videos of similar length, and keeping the length where viewers stop leaving. Revisit it when your format changes.