Reading time and speaking time both come from the same word count, but they're built on different assumptions — and mixing them up is a common mistake. A 1,500-word blog post and a 1,500-word conference talk take very different amounts of time to get through, because reading and speaking simply don't move at the same pace.

How reading time is calculated

Reading time estimates are typically based on an average adult silent reading speed of around 200 words per minute. That figure comes from studies of how quickly people process written text on a page or screen without saying it aloud. It's a genuinely useful benchmark, but it moves around a lot based on a few factors:

• Familiarity with the topic — a reader skimming familiar material reads faster than one working through unfamiliar vocabulary or concepts.
• Sentence complexity — longer sentences with multiple clauses slow readers down even at a fixed words-per-minute rate, which is part of why readability scores exist.
• Medium — most people read slightly slower on a screen than on paper, and slower still on a small phone screen with frequent scrolling.

How speaking time is calculated

Speaking time estimates usually assume a pace closer to 130 words per minute — noticeably slower than silent reading, because speech includes natural pauses, emphasis, and breath that reading doesn't. This number is a reasonable baseline for a prepared talk or presentation, but real speaking pace varies more than reading pace does:

• Nervous speakers tend to speed up, sometimes pushing well past 150 words per minute without realizing it.
• Practiced speakers slow down deliberately for emphasis, especially around key points.
• Q&A, slide transitions, and audience reactions aren't captured in a word-count-based estimate at all — they add real time that a script's word count won't show.

Which number actually matters for your writing

The right estimate depends entirely on what you're producing:

• Reading time matters for blog posts, articles, emails, and anything a reader will scan or read silently. If you're optimizing for "will someone actually finish this," reading time is your number.
• Speaking time matters for scripts, presentations, wedding toasts, podcast segments, and voiceover work — anything where the words will be spoken aloud, live or recorded.

A common mistake: writers draft a 5-minute speech using reading-time math and end up with a script that actually runs 7–8 minutes once it's spoken aloud, because they used 200 words per minute instead of 130.