Calculator · 100% free, no signup · Updated May 2026
Platform-optimal clip lengths from one source video.
A free calculator that converts a source video length + niche into a per-platform clip extraction plan. Outputs how many clips to extract and the algorithm-optimal duration range for TikTok (21-34s), Reels (30-90s), YouTube Shorts (25-58s), LinkedIn native (30-90s), and X (15-45s).
Enter source video length + niche. The optimizer outputs how many clips you should pull and the ideal duration range per platform, based on 2026 algorithm retention curves.
Source video
Niche tunes the moment-density estimate. Comedy = ~10/hr, education = ~5/hr.
Recommended clip plan
TikTok
6 clips × 21–34s
Algorithm rewards 21-34s loops. Avoid >60s.
Instagram Reels
6 clips × 30–90s
Sweet spot is 30-90s. >90s gets pushed less.
YouTube Shorts
6 clips × 25–58s
Cap is 60s. Highest looping at 25-58s.
LinkedIn Native
6 clips × 30–90s
Best is 30-90s. Captions critical (80% watch muted).
X (Twitter)
4 clips × 15–45s
Short attention. 15-45s gets most replies.
Manual cropping each clip to platform-optimal length takes ~5–10 min. Clipflow auto-reframes + retimes per platform in one pass.
Who this is for
Creators repurposing long-form video who keep guessing how many shorts they can extract and how long each should be.
The problem this solves
Each platform has a sweet-spot clip length the algorithm rewards. TikTok pushes 21-34s. Reels rewards 30-90s. Shorts caps at 60s but 25-58s gets most loops. Most creators cut to one length and re-use across platforms — that's why retention drops.
Each major short-form platform rewards a different clip-length sweet spot: TikTok 21-34s, Reels 30-90s, YouTube Shorts 25-58s — yet 73% of creators upload the same clip length across all platforms, costing them 30-50% reach.
Source: Tubular Labs cross-platform retention study 2024 + Buffer State of Social 2025
How to use it
- 01
Source video length
Minutes of long-form content (podcast, YouTube video, webinar).
- 02
Pick niche
8 niches — adjusts the moment-density estimate per minute of source.
- 03
See platform breakdown
# of clips you can realistically extract + ideal duration range per platform.
- 04
Export as clip-plan
Copy as a structured plan: platform → count → length range.
What you get
- ✓ Optimal clip count per platform
- ✓ Ideal duration range per platform (2026 data)
- ✓ Realistic moment-density per niche
- ✓ Copyable clip plan
Frequently asked
What's the ideal clip length for TikTok?
The algorithm rewards 21-34 second clips most strongly because they loop cleanly without losing watch-time momentum. Clips over 60 seconds get pushed less unless retention exceeds 70%.
How is YouTube Shorts different from TikTok in terms of length?
Shorts cap at 60 seconds. The 25-58 second range gets the highest looping rate. Under 15 seconds the algorithm under-weights the impression count, so very-short clips actually under-perform mid-length ones.
Should I use the same clip on TikTok and Reels?
You can, but trim to 30-90s for Reels even if the TikTok cut was 22s — Reels under-rewards sub-30s clips. The optimizer outputs platform-specific length ranges so you don't cross-post a sub-optimal version.
How many clips can I pull from a 60-minute podcast?
Most niches yield 5-8 clips per hour of source content. High-energy formats (debate, comedy) yield up to 10-12. Education / explainer formats: 4-6. The optimizer adjusts based on your niche.
Does Clipflow handle platform-specific length automatically?
Yes. Clipflow detects each viral moment and outputs platform-specific versions (TikTok cut, Reels cut, Shorts cut) with the right duration for each. You upload one source video; you get 4-5 platform-optimized exports.
Related tools
Author + maintainer
Adrian Berisha — Founder of Clipflow. Indie SaaS builder shipping creator tools full-time since 2024. All tools and benchmarks on this page are reviewed quarterly. Last review: May 2026.
@clipflow on X · LinkedIn · hi@clipflow.to
Want this baked into your workflow?
Clipflow runs the whole repurposing pipeline — clip-finder, brand-voice captions, scheduler, multi-platform publish — for free on the Starter plan.
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