How reading time is calculated
Reading time is calculated by dividing the total word count by your selected reading speed in words per minute (WPM). The default speed of 238 WPM is the median adult silent reading speed, based on research published in the journal Reading and Writing by Brysbaert (2019), which analysed reading speed data from 190 studies involving nearly 18,000 participants across multiple languages and countries. This is the most comprehensive study of adult reading speeds to date.
The speed slider on this tool allows you to adjust for your own reading pace or the specific context you're planning for. A general audience article might be planned at 238 WPM; a technical manual read by specialists familiar with the content might be planned at 300 WPM; a presentation script is best planned at 130 WPM to account for the slower pace of spoken delivery.
Average reading speeds by context
Silent reading — adult average: 200–300 WPM. Most adults read between 200 and 300 words per minute when reading silently for comprehension. The scientific median is 238 WPM. Reading speed varies significantly by individual, content type, and purpose — skimming for overview is much faster than reading for detail or memorisation.
Speed reading: 400–700 WPM. Trained speed readers using techniques like chunking and reduced subvocalisation can reach 400–700 WPM. However, research consistently shows that comprehension decreases significantly above 400 WPM. Claims of 1,000+ WPM with full comprehension are not supported by peer-reviewed evidence.
Presentations and public speaking: 120–150 WPM. The average speaking pace for a clear, well-paced presentation delivery. TED Talks average around 130–150 WPM. Faster speakers risk losing their audience; slower speakers can feel laborious. For complex technical content, 110–120 WPM gives the audience time to process.
Audiobooks and narration: 150–160 WPM. Professional audiobook narrators typically record at 150–160 WPM — faster than natural speech but slower than silent reading, calibrated for comfortable listening over extended periods.
Children reading aloud (age 6–8): 50–100 WPM. Early readers are still developing decoding skills and read much more slowly than adults. Reading speed develops rapidly with practice, typically reaching adult speeds by age 12–14 for average readers. Students with dyslexia often read at 100–150 WPM even as adults.
Elderly readers: Reading speed typically declines gradually with age, with adults over 70 often reading at 180–210 WPM due to changes in visual processing and working memory. This has implications for designing accessible content for older audiences.
Why reading time matters for content creators
Displaying estimated reading time on articles and blog posts has become a standard practice on major publishing platforms including Medium, Substack, and many news sites. The reason is straightforward — readers who know the time commitment before starting are more likely to begin reading and less likely to abandon mid-article.
Research by Medium found that articles with a reading time of approximately 7 minutes attract the highest level of reader engagement — enough depth to convey substance without overwhelming readers. For blog posts and content marketing, 1,500–2,500 words (6–10 minutes at average reading speed) represents the sweet spot for balancing SEO performance with reader retention.
For email newsletters, reading time has become an important factor in open rate optimisation. Emails estimated to take under 3 minutes to read have significantly higher completion rates than longer ones. Subject lines that include reading time estimates ("5-minute read: this week's digest") have been shown to improve open rates for audiences who value efficiency.
For educators, reading time estimates help in curriculum planning — knowing how long an assigned text will take to read allows teachers to set realistic homework expectations and allocate appropriate in-class reading time.
Reading time and SEO
Reading time is indirectly important for SEO because it correlates with content depth, which Google rewards. Longer, more comprehensive content tends to rank better for competitive keywords — not because of length alone, but because more words generally allow more thorough coverage of a topic. However, the relationship is not linear. Padding content with low-value filler to inflate word count has the opposite effect, increasing bounce rates and reducing time on page.
The most effective approach is to write content that takes the amount of time it genuinely needs — covering the topic completely without unnecessary repetition. Using a reading time estimate as a planning tool before writing, rather than as a post-hoc measure, helps set appropriate scope for a piece before a word is written.
Planning speeches and presentations
Reading time calculation is one of the most reliable ways to plan speech length. At 130 WPM — the standard planning rate for presentations — a 10-minute speech requires approximately 1,300 words of script. A 20-minute keynote needs around 2,600 words. A 5-minute wedding speech needs 650 words.
These estimates assume a reasonably steady pace throughout. In practice, applause, pauses for effect, Q&A, and nervous pacing all affect actual delivery time. Most experienced speakers recommend writing to 90% of the target time and leaving 10% as a buffer for the unexpected.
Frequently asked questions
How accurate is the reading time estimate?
It is a well-researched estimate based on the scientific median reading speed, not an exact prediction. Individual reading speeds vary significantly based on familiarity with the subject, text complexity, reading conditions, and individual ability. The 238 WPM default represents the median — roughly half of adult readers are faster and half are slower. Use the speed slider to adjust for your own pace or your intended audience. For practical planning purposes, the estimate is reliable within a margin of 15–20%.
What is the average reading speed for a student?
Reading speed varies considerably by age, subject familiarity, and reading purpose. Primary school children (age 7–11) typically read at 80–150 WPM. Secondary school students read at 150–250 WPM. University students average around 250–300 WPM for academic material in their field, though this drops for unfamiliar technical content. For leisure reading of familiar fiction, the same student might read at 300–400 WPM. Speed typically plateaus in early adulthood and remains relatively stable until later in life.
How long does it take to read a book?
The average adult novel is 80,000–100,000 words. At 238 WPM reading for one hour per day, a 90,000-word novel takes approximately 6.3 hours — roughly 6–7 days of daily reading. A shorter novel or memoir of 50,000 words takes around 3.5 hours. A non-fiction book of 70,000 words may take longer than the word count suggests because non-fiction is typically read more slowly than narrative fiction. Paste a chapter to get an accurate per-chapter estimate for planning a reading schedule.
How is speaking time different from reading time?
Speaking aloud is significantly slower than silent reading — typically about half the speed. Silent reading involves no physical articulation and the brain can process words faster than the mouth can produce them. The average speaking pace for a clear, natural, well-paced delivery is 120–150 WPM. This tool uses 130 WPM as the speaking time default, which suits most presentations, speeches, and narrations. Conversational speech is often faster at 140–160 WPM; formal or deliberate speech may be slower at 100–120 WPM.
Can I use this to plan a TED Talk or keynote?
Yes — this is one of the most practical uses of the reading time calculator. TED Talks are capped at 18 minutes, which at 130 WPM requires approximately 2,340 words of script. A standard 45-minute keynote needs around 5,850 words. Most professional speakers recommend writing a full script to plan timing, then speaking from notes or memory rather than reading verbatim — but the word count gives you a reliable benchmark for scope. Always rehearse with a timer, as delivery pace varies significantly from planning estimates.
Does reading on screen take longer than reading print?
Research suggests that screen reading is typically 20–30% slower than reading equivalent print content, though this gap has narrowed significantly with high-resolution displays. Factors including screen glare, scrolling behaviour, notification interruptions, and the tendency to skim digital content all contribute. For practical planning, it is worth assuming that digital content will take slightly longer to read than the estimate suggests, particularly for long-form content intended to be read on mobile devices.