Writing 4 min read

Word Count Requirements for Every Major Platform (2025 Guide)

Every platform you write for has a different idea of how long your content should be. Twitter counts characters. LinkedIn counts characters differently. College application essays count words. SMS messages count bytes. Email subject lines have soft limits that vary by inbox.

This guide collects the limits that matter most for writers, students, and content creators — in one place, with practical advice on hitting each one.

Social Media Character Limits

Platform	Limit	Notes
X (Twitter)	280 chars	Free accounts. URLs count as 23 chars regardless of length. Spaces count.
X (Twitter) — Premium	25,000 chars	X Premium subscribers. Long-form posts display with a "Show more" cutoff.
Instagram caption	2,200 chars	Feed shows ~125 chars before "more". Hashtags count toward the limit.
Instagram bio	150 chars	No line breaks in most third-party tools; use the app itself for formatting.
Facebook post	63,206 chars	Effectively unlimited for most use cases. Posts over ~400 chars get a "See more" cutoff.
LinkedIn post	3,000 chars	Preview shows ~210 chars before "See more". First 2 lines drive engagement.
LinkedIn article	125,000 chars	Long-form publishing. Indexed by Google — treat like a blog post.
TikTok caption	2,200 chars	Only first ~100 chars visible on feed without expanding.
YouTube title	100 chars	Search results truncate at ~60–70 chars. Keep the key phrase in the first 60.
YouTube description	5,000 chars	First 157 chars appear in search results. Front-load important information.
Pinterest description	500 chars	Feed shows ~50 chars. Keyword-rich descriptions improve search visibility.

Email Limits

Field	Limit	Notes
Subject line (technical)	998 chars	RFC standard maximum. In practice, keep it much shorter.
Subject line (display — desktop)	~60 chars	Gmail, Outlook desktop clients typically show 60–70 chars.
Subject line (display — mobile)	~30 chars	Mobile inboxes often show only 30–40 chars, especially in notifications.
Preview / preheader text	85–100 chars	The grey text after the subject in inbox view. Write this intentionally — it heavily affects open rates.
Email body (technical)	Effectively unlimited	No meaningful limit for HTML email. Gmail clips messages over 102 KB of HTML.

Practical email advice: Write subject lines of 40–50 characters to display well on both desktop and mobile. Put the most important word first — if the subject gets cut off, you want the key information to survive the truncation.

Academic and Application Word Counts

Document type	Typical range	Notes
Common App essay (US)	250–650 words	Hard maximum of 650 words enforced by the platform. Minimum 250 words. Aim for 550–650.
UC Personal Insight Questions	350 words each	Hard cap per question (4 questions from a list of 8). No minimum stated.
Graduate school personal statement	500–1,000 words	Varies by programme. Follow the specific programme's instructions exactly.
High school essay	500–1,500 words	Depends on assignment. Standard 5-paragraph essay ≈ 500–800 words.
Undergraduate essay	1,500–3,000 words	Typical range. +/- 10% of the stated word count is usually acceptable.
Master's dissertation	15,000–25,000 words	Wide variation by institution and discipline. Confirm with your department.
PhD thesis	60,000–100,000 words	Varies significantly by country and discipline.

SEO and Web Content

Search engines do not publish official word count requirements, but patterns emerge from SEO research:

Meta description: 150–160 characters. Google often rewrites it, but a well-crafted description improves click-through rates.
Page title (title tag): 50–60 characters. Google truncates titles in search results at approximately 600px display width.
Blog post — informational: 1,500–2,500 words tends to rank well for informational queries. Longer is not always better; match the depth that the topic actually requires.
Product page description: 300–500 words minimum to give search engines enough content to index meaningfully.
FAQ answer: 40–60 words per answer is often enough to capture a featured snippet, which Google typically displays at around 40–50 words.

SMS and Messaging

Platform	Limit	Notes
SMS (GSM-7)	160 chars	Standard character set (Latin alphabet). Messages longer than 160 chars are split into 153-char segments and reassembled.
SMS (Unicode)	70 chars	When the message contains any emoji, accented characters, or non-Latin script, the limit drops to 70 chars per segment.
WhatsApp message	65,536 chars	Effectively unlimited for normal use.
Telegram message	4,096 chars	Individual message cap. For longer content, use Telegram's file or post features.

Emoji and SMS: Adding even a single emoji to an SMS message switches the encoding from GSM-7 to Unicode, cutting the single-message limit from 160 to 70 characters. If you are sending SMS campaigns, test your character count without assuming emoji-safe limits.

Tips for Writing to Length

Count as you write, not after. Checking word count once at the end leads to over-writing and painful cuts. Track your count in real time so you stay close to the target throughout.
Cut adverbs and filler phrases first. "In order to" → "to". "Due to the fact that" → "because". These cuts rarely change meaning.
One idea per sentence. Long compound sentences almost always split into shorter, clearer ones — and shorter sentences count fewer words.
Read your subject line on mobile before sending. What looks fine on a desktop inbox often gets truncated on a notification screen.

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