Optimal Reel length for the Instagram algorithm

There's no single "magic" length – the algorithm responds to retention (how many viewers stay until the end) and completion. Short, strong Reels usually win; long ones work when the content justifies it. Here are practical recommendations.

When length matters

• Algorithm checks retention – The share of viewers who stay until the end affects reach. Long Reels with many drop-offs get less boost.
• Short attention – Most viewers decide in the first seconds. If there's no progress or value – they leave.
• Content type – Quick tips fit 15–30 seconds; a story or detailed guide can justify 60–90.

Optimal length – how to decide

1. 15–30 seconds – Recommended for most Reels: tips, before/after, trend responses. Easy to keep retention and get positive signals from Instagram. Read How to make Reels on Instagram.

2. 30–60 seconds – When you need a short explanation, mini story or a few steps. Make sure there's no "dead time" – every second should add value.

3. 60–90 seconds – For guides, stories or content that needs breathing room. Only if you're confident the content holds – otherwise cut or split into 2 Reels.

4. Check Insights – In Insights see which Reels got high watch percentage and good reach. Adjust length based on what works for you.

Common mistakes

• Long Reel "for the algorithm" – Length alone doesn't help. Retention to the end matters.
• Filling time with filler – 20 seconds of strong content beats 60 with 40 seconds of filler.
• Ignoring data – If most of your short Reels work better – focus on those.

Summary

Optimal Reel length: 15–30 seconds for most content, 30–60 when you need more context, 60–90 only when there's clear value. The algorithm responds to retention – short and strong beats long and scattered. Check Insights and adjust.

Next steps

• How to make Reels on Instagram – Reels basics
• Why Reels don't get views – reach and fixes
• How to make a viral Reel – more exposure