Ideal Email & Newsletter Length
Balancing open rate, read-through rate and unsubscribe risk with reading time.
Quick answer: transactional and update emails read best under 200 words (under 1 minute); regular newsletters perform well between 400-600 words (roughly 2-3 minutes); long-form editorial newsletters can run 1,000+ words if the audience has opted in specifically for depth.
Why email length is a different problem than blog length
Unlike a blog post, email reading time competes directly against an inbox full of alternatives, and most opens happen on mobile in short attention windows. The goal isn't to maximize reading time — it's to match the length to reader intent for that specific email type.
| Email type | Words | Reading time (238 WPM) |
|---|---|---|
| Transactional / receipt | <100 | <30 sec |
| Product update / announcement | 100-200 | ~30-50 sec |
| Standard newsletter | 400-600 | ~1.7-2.5 min |
| Editorial / long-form newsletter | 1,000-1,500 | ~4.2-6.3 min |
Read-through vs. open rate
Open rate measures whether the subject line worked; read-through rate measures whether the body content held attention once opened. Longer newsletters generally show lower read-through percentage but can still deliver more total engaged reading time from the fraction who do read fully — track scroll depth or click position, not just word count, to judge if length is actually a problem for your list.
Showing reading time in a newsletter
Adding a small "3 min read" label near the top of a longer newsletter helps subscribers self-select whether to read now or save it, similar to the blog use case covered in our reading time & SEO guide. Paste your draft into the calculator to get an exact figure before sending.