There is no single useful length for every Facebook post
A short event update, a customer explanation, and a long personal story solve different problems. The appropriate length depends on the audience's intent and how much context is required—not on filling the available field.
Front-load the point because feed interfaces can collapse longer copy. If the post sends readers to an article, explain why the link matters before adding background. If the post must stand alone, use headings or short paragraphs to make it scannable.
- State the subject in the opening line.
- Break dense copy into short paragraphs.
- Put dates, prices, eligibility, or warnings where they cannot be missed.
Why old maximums should be treated carefully
A number commonly repeated online may refer to a historic web composer, a Page API field, an ad format, or a different Meta product. Those values can drift while search results continue to repeat them without context.
Meta's public Help Center describes how to create and edit posts but does not provide one durable limit table covering profiles, Pages, Groups, Business Suite, ads, and APIs. For publication-critical work, the current interface or API response is authoritative.
Use an editorial goal as a decision tool
The counter lets you set a target rather than pretending every post has the same ideal. A 300-character target can enforce a concise update; a 1,000-character target can accommodate context. Exceeding your own target is a prompt to edit, not a platform error.
Before publishing, preview the post on the devices your audience uses. A clear first screen matters more than an abstract maximum.