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It depends on the context. Cold outreach emails perform best at 50-125 words, internal updates should stay under 300 words, and client emails work well at 75-250 words. Newsletters can be longer, up to 500 words, but shorter is almost always better for response rates. A study by Boomerang found that emails between 50 and 125 words had response rates above 50%.
Research consistently shows that cold emails between 50 and 125 words get the highest response rates. Emails under 125 words have a 50% higher response rate than longer ones. The key is to be concise: state who you are, why you're reaching out, and include a clear, single call to action. If your cold email is over 200 words, you're likely losing readers before they reach your ask.
The average person reads business emails at about 200 words per minute, which is slower than general reading speed (250-300 wpm) because work emails require more careful attention and context-switching. A 200-word email takes roughly one minute to read. Mobile readers tend to be even slower, scanning at about 150 words per minute, which matters since over 60% of emails are now opened on mobile devices.
Yes, significantly. Studies by Boomerang found that emails between 50 and 125 words had the best response rates, while emails over 200 words saw a sharp decline. For cold outreach, brevity signals respect for the recipient's time and increases the chance of a reply. Internal emails can be slightly longer, but even then, keeping them under 300 words improves the chance that people actually read the whole thing.
Unboxd reads every email and gives you a daily briefing with only what matters.