What is Content Half-Life?
Definition: Content Half-Life is the time it takes for a piece of content to accumulate 50% of its total lifetime engagement. Short half-life content (X posts, trending TikToks) reaches peak engagement within hours. Long half-life content (SEO articles, evergreen TikToks) continues accumulating engagement for weeks or months. Understanding content half-life helps creators allocate effort between trend-responsive and evergreen content.
What Is Content Half-Life?
It’s a simple way to describe how your content fades over time. Kind of like how a trending video slowly drops off your feed, posts lose engagement in a pretty predictable pattern after they hit their peak.
Half-life = the time it takes for a post to accumulate 50% of its total lifetime engagement.
Half-Life by Platform
| Platform | Typical Content Half-Life |
| --- | --- |
| X (Twitter) text post | 15–30 minutes |
| X thread | 2–4 hours |
| TikTok trending video | 24–48 hours |
| TikTok evergreen tutorial | 7–30 days |
| Instagram Reel | 24–72 hours |
| YouTube video | 14–90 days |
Why Half-Life Matters for Creators
Understanding your content's half-life tells you:
- When to post follow-up content — posting a second piece during a post's active window maximises compounding reach
- Where to invest repurposing effort — content with long half-life (evergreen tutorials) deserves more production time
- How to time engagement — for short half-life content, you have a narrow window to engage with comments and drive more velocity
Short Half-Life vs Long Half-Life Strategy
- Short half-life content (trending topics, hot takes, news commentary): requires fast production and immediate publishing. Success window is 4–12 hours. - Long half-life content (tutorials, frameworks, how-tos): worth investing in high production quality. Continue distributing and updating over months.
How Funnell Tracks Content Half-Life
Funnell analyses your post engagement curves to calculate average content half-life by format and category. It identifies which of your content types are generating sustained long-tail engagement (valuable for compounding growth) versus which types spike and decay quickly.
How Funnell.ai Tracks Content Half-Life
Funnell analyses your engagement decay curves to identify which content types have the longest half-life — helping you prioritise evergreen formats that generate compounding growth over time.
Track Content Half-Life AutomaticallyFrequently Asked Questions About Content Half-Life
What is Content Half-Life?
It’s a simple way to describe how your content fades over time. Kind of like how a trending video slowly drops off your feed, posts lose engagement in a pretty predictable pattern after they hit their peak.
Which platform has the longest content half-life?
YouTube has the longest content half-life (weeks to months), followed by evergreen TikTok content. X (Twitter) text posts have the shortest half-life at 15–30 minutes.