How Long Should a Short Film Be? The Real Answer

The short answer

How long should a short film be? For most narrative work, aim for under 10 minutes, and treat 15 minutes as your hard ceiling. That range gets you into the widest pool of festivals and keeps an audience leaning in instead of checking the clock. The old rule still holds: a short film should be exactly as long as the story needs and not one second longer.

But "as long as it needs to be" is a cop-out if you have never edited to it. So let's put real numbers behind the instinct, then talk about how to actually hit your target.

How many minutes is a short film, officially?

The technical definition is generous. The Academy of Motion Picture Arts and Sciences defines a short film as any original motion picture with a runtime of 40 minutes or less, including credits. BAFTA, SXSW, Tribeca, and most major festivals use a similar 40-minute cutoff.

That is the legal outer edge, not a target. Very few films that actually get programmed run anywhere near 40 minutes. Think of 40 minutes as the wall, and everything useful happening in the first quarter of the room.

For a plain-English breakdown of the shape of a short versus a feature, see our guide on how to make an AI short film.

The ideal short film length (what actually gets in)

Here is where the data gets specific. When one analyst studied the official rules of more than 13,000 festivals, the acceptance math was blunt:

• Under 10 minutes: eligible for roughly 90% of festivals
• 10 to 20 minutes: eligible for about 56%
• 21 to 30 minutes: eligible for around 26%
• Over 45 minutes: eligible for under 9%

Every extra minute past ten quietly deletes options. Programmers build shorts into blocks of about 90 minutes and want to fit as many strong films as possible, so a tight 7-minute piece is simply easier to say yes to than a 24-minute one that has to earn its slot twice over.

The ideal short film length for a narrative piece is therefore in the 5-to-10-minute band. Animation can go shorter and still land; documentary can run to 15 or 20 and still program comfortably.

Average short film runtime at the big festivals

Definitions set the ceiling, but averages tell you where the crowd actually sits. The typical selected short runs around 13 minutes, and the majors cluster tightly:

• SXSW: about 12 minutes, 46 seconds on average
• Sundance: about 13 minutes, 22 seconds
• Cannes: roughly 14 minutes

More prestige-heavy programs like Berlinale and the Oscar shortlist skew longer, often past 20 minutes, because a film with that much rope had better be exceptional. Both SXSW and Sundance program the most films in the 10-to-15-minute bracket, and films past 25 minutes are consistently the least popular with programmers.

So the average short film runtime is around 13 minutes, but averages hide the safe play: shorter than the average is almost never the thing that gets you rejected.

Short film length for festivals: read the rules first

Before you lock a cut, check the specific festivals on your list, because the maximums vary more than people expect:

• Berlinale Shorts caps entries at 30 minutes
• Clermont-Ferrand and many national festivals use the 40-minute short definition
• Some competitive slots, historically, have wanted 15 minutes or under

If your film runs 22 minutes, you have just made yourself ineligible for a large slice of festivals before a single programmer watches it. Build your submission strategy around your runtime, not the other way around. Our guide to AI short film competitions covers where to submit and what each venue rewards.

How to hit your target length on purpose

Runtime is a craft decision, not an accident you discover in the edit. A few habits keep you honest:

• Plan the runtime before you shoot. Roughly one script page equals one screen minute, a rule of thumb rooted in standard screenplay formatting. A 9-page script is a 9-minute film. Map it early with our scene planning walkthrough.
• Cut the setup, not the payoff. Most overlong shorts bleed time in the first minute. Start as late into the scene as you can.
• Storyboard so every shot has a job. If a shot does not advance character or plot, it is runtime you are spending for nothing. A storyboard for your film exposes the dead weight before you generate anything.
• Kill your darlings in the edit. The beautiful shot that stalls the story is the one to lose first.

If you are making your film with AI, length is a different kind of constraint: most models generate a few seconds per clip, so a finished short is many short takes stitched together. That is a feature, not a bug, because it forces you to think in deliberate beats. We cover the stitching workflow in how to make longer AI videos.

Make a tight short without the gear

You do not need a crew, a camera, or an edit suite to test whether your story works at 8 minutes instead of 18. Scriptly lets you chat with an AI director to design consistent characters, plan your scenes, generate video take by take, and render a finished film with voiceover, captions, and music, all in the browser.

That means you can build a full short, watch it back, and cut it to a festival-friendly runtime in an afternoon, then iterate until every minute earns its place. Start your first short at Scriptly, and browse more filmmaking guides on the blog when you are ready to go deeper.

The honest answer to how long a short film should be is short, tight, and finished. Under 10 minutes opens the most doors. Everything past that, you have to earn.