Best Video Length for TikTok, Reels & Shorts

Best Video Length for Short-Form Platforms

Video length significantly impacts performance. Here's what the data shows.

Optimal Lengths by Platform

TikTok

• Sweet spot: 21-34 seconds
• Good range: 15-60 seconds
• Maximum: 10 minutes (but longer rarely performs)

Instagram Reels

• Sweet spot: 15-30 seconds
• Good range: 7-60 seconds
• Maximum: 90 seconds

YouTube Shorts

• Sweet spot: 30-45 seconds
• Good range: 15-60 seconds
• Maximum: 60 seconds (hard limit)

Why Shorter Often Wins

Completion Rate

Algorithms track what percentage of your video people watch. A 15-second video watched completely signals higher quality than a 60-second video watched halfway.

Attention Spans

Attention on social feeds is scarce—viewers decide within seconds whether to keep watching. Shorter videos are easier to watch multiple times.

Replay Value

Videos under 30 seconds often get replayed, which counts as additional engagement.

When Longer Works

Longer videos (45-60 seconds) work when:

• Content is highly educational
• Story has a clear arc
• Audience is already invested (established creator)
• Content is "sticky" (people want to see the ending)

Length Strategy

For Growth

Start with shorter (15-30 seconds) to maximize completion rates and reach new audiences.

For Engagement

Once you have an audience, test longer content (45-60 seconds) for deeper engagement.

For Repurposed Content

Let the content dictate length. Cut to where the moment naturally ends, not to a target length.

Testing Your Optimal Length

1. Post videos at different lengths
2. Track completion rate in analytics
3. Note which lengths get pushed to more viewers
4. Double down on what works for YOUR audience