"Can I finish this before book club on Wednesday?" "Do I have time to reread the assigned chapters before the exam?" Every reader asks these questions — and most underestimate. Here's a realistic guide to how long it takes to read a book, broken down by page count, reading speed, and genre.
Average reading speeds
Adult readers vary widely:
| Reader type | Words per minute |
|---|---|
| Slow reader | 150–200 |
| Average adult (silent) | 238 (non-fiction) to 260 (fiction) |
| Fast reader | 300–400 |
| Auditory/listening | 150–180 (audiobook 1x) |
Comprehension generally drops above 400 wpm for detailed material — speed reading works better for skimming than for depth.
How to measure your reading speed
Every estimate in this guide depends on your words per minute, so it pays to test yourself rather than guess. Reading speed is simply:
WPM = Words read ÷ Minutes
A quick self-test:
- Pick a book you've never read.
- Read for exactly 3 minutes at your natural pace.
- Count the words, or estimate them: at about 250 words per page, 3 pages is roughly 750 words, and 750 ÷ 3 = 250 wpm.
- Answer 5 comprehension questions on what you read (make them up, or better, take them from a study-guide summary).
- Score it: speed = words ÷ 3; comprehension = questions right ÷ 5.
Raw speed means little on its own, so the more useful number is your effective reading speed:
Effective reading speed = WPM × Comprehension %
Someone racing along at 400 wpm with 50% comprehension has an effective speed of 200 — lower than a careful reader at 250 wpm with 90% comprehension (225 effective). When you plan how long a book will take, use the speed at which you actually understand what you read.
How many words are in a book?
Average words per page depend on format:
- Mass-market paperback: 250–300 words/page
- Trade paperback/hardcover novel: 300–400 words/page
- Textbook: 400–600 words/page (with figures)
- E-readers: words per screen change with the device and font size you choose
Reading time table (average reader, 250 wpm)
| Pages | ~Words | Reading time |
|---|---|---|
| 100 | 30,000 | 2 hours |
| 200 | 60,000 | 4 hours |
| 300 | 90,000 | 6 hours |
| 400 | 120,000 | 8 hours |
| 500 | 150,000 | 10 hours |
| 700 | 210,000 | 14 hours |
| 1,000 | 300,000 | 20 hours |
Reading speed by genre
Don't assume your "average" speed applies to everything:
- Popular fiction (romance, thriller): +20% faster than baseline — flowing prose, narrative pull
- Literary fiction: -10-20% slower — denser language, rereading passages
- Technical/textbook: -50% slower — pausing to re-read, examining figures, taking notes
- Poetry: much slower — meant to be read multiple times
- Legal/academic: -60% slower with note-taking
Example: full-length novel
A 400-page novel at trade paperback density (350 words/page) = 140,000 words.
- Slow reader (175 wpm): 800 minutes = 13.3 hours
- Average (250 wpm): 560 minutes = 9.3 hours
- Fast (350 wpm): 400 minutes = 6.7 hours
Classic books reading time
| Book | Pages | Time at 250 wpm |
|---|---|---|
| The Great Gatsby | 180 | 3.6 hours |
| To Kill a Mockingbird | 280 | 5.6 hours |
| 1984 | 330 | 6.6 hours |
| Pride and Prejudice | 432 | 8.6 hours |
| Crime and Punishment | 560 | 11.2 hours |
| Harry Potter and the Deathly Hallows | 759 | 15.2 hours |
These times use the same basis as the reading time table: about 300 words per page at 250 wpm, or 1.2 minutes a page. Page counts vary by edition, and dense books fit more words on a page, so if you know a book's word count, use that instead.
Audiobook comparison
Audiobooks are narrated at ~150-180 wpm. This means:
- Average reader beats audiobook at 1x speed
- Most listeners speed up to 1.25x-1.5x to approximate their reading speed
- At 2x speed (~320 wpm), an audiobook matches a fast visual reader
For a 150,000-word book, audiobook at 1x = 15 hours; at 1.5x = 10 hours; at 2x = 7.5 hours.
How to read more per day
- Find pocket time: 10 minutes in line + 15 before bed + 5 waiting at appointments = 30 min/day = 3 hours 30 min/week
- Use audiobooks for commutes: 30 min × 5 days = 2.5 hours/week added
- Set a daily page goal: 20 pages/day = 600 pages a month, about two 300-page novels
- Keep a book wherever you wait: physical book in your bag, ebook on phone
- Use "rule of 50": if you're 50 pages in and not enjoying it, stop — life is short
How to read faster without losing comprehension
Finding more time is one lever; reading more efficiently is the other. Expect modest gains, not miracles: a major review of the research (Rayner et al., 2016) found that reading faster than your normal pace generally costs comprehension, and that the dependable route to faster reading is ordinary practice, reading more so that words and phrases become familiar.
Put comprehension first
If comprehension drops below 70%, slow down. The goal isn't speed for its own sake — it's understanding per unit of time. Practice in this order:
- Make sure you have 80%+ comprehension at your current speed.
- Push your speed up about 10% at a time.
- If comprehension drops, hold at the new speed until it recovers.
- Repeat.
Don't fight the inner voice
Most readers "say" each word in their head as they read. Speed-reading courses often promise big gains from suppressing this subvocalization, for example by counting or humming while you read. The research review by Rayner and colleagues found that speed-reading methods raise speed only at a cost to comprehension, so keep the inner voice, especially for difficult material.
Let your eyes go back when they need to
Eye-tracking studies show readers regularly make "regressions", snapping back to re-read words they've already passed. These aren't wasted effort: the eyes move back mostly to material that wasn't understood the first time, and when researchers prevent readers from looking back, comprehension gets worse. Frequent rereading is a cue to slow down, not to force your eyes forward.
Why eye-span training disappoints
Some courses promise you can take in whole lines or pages at a glance by training your peripheral vision. The research doesn't support this: how much you take in during each fixation is limited by language processing, meaning how quickly you recognize words and make sense of them, and text in peripheral vision is too blurry to read. Your eyes aren't the bottleneck, which is why reading widely, so more words are instantly familiar, does more than eye drills.
Match your speed to the material
Fast readers don't read everything at the same speed. For a nonfiction chapter:
- Preview — headings, subheadings, and the first and last sentence of each paragraph (about 2 minutes for a chapter).
- Scan for key information if you know what you're looking for.
- Read carefully only the portions that matter most.
- Skim less important supporting material.
This matches reading speed to content density — slow for the 20% that matters, fast for the 80% that doesn't.
Tools that can help
- Audiobooks at 1.5-2x speed: train your ear to process language faster.
What speed reading can't do
Courses promising 1,000+ wpm with full comprehension are mostly overselling. A review of the research by Keith Rayner and colleagues (2016) found:
- Skilled readers already average about 200–400 wpm.
- Reading faster than your normal rate comes with a loss of comprehension, and evaluations of trained speed readers show the same trade-off.
- Apps that flash one word at a time in the center of the screen, as Spritz-style readers do, remove eye movements but also stop you from looking back, which hurts recall at faster speeds.
- Speed-reading training may help with skimming, getting the gist quickly, which is a different task from reading for full understanding.
Children's books and YA
Younger readers have different expected rates:
- Early readers (ages 6-8): 50-100 wpm
- Middle grade (ages 9-12): 100-175 wpm
- YA (ages 13+): 150-250 wpm (approaching adult)
Kids' books also have larger fonts and more illustrations — roughly 150 words/page average.
Oral reading fluency norms show how reading speed develops in the early grades. These are median spring scores in words correct per minute, read aloud (Hasbrouck and Tindal, 2017):
- End of grade 1: 60
- End of grade 3: 112
- End of grade 5: 146
- End of grade 6: 146
These norms stop at grade 6. For comparison, adults reading silently average about 238 wpm for non-fiction and 260 wpm for fiction (Brysbaert, 2019).
A child reading well below these norms may have dyslexia or another reading difficulty — worth a professional assessment.
Textbook reading
For dense academic material, factor in:
- Taking notes: doubles the time
- Re-reading difficult passages: +30-50%
- Studying figures, tables, equations: adds significant time per page
Plan on textbook chapters taking 2–3× the time the word count suggests.
Planning a reading challenge
Many readers set annual goals — 12, 24, or 52 books per year. Here's the math for 300-page (about 90,000-word) books at 250 wpm, or 6 hours per book:
- 12 books/year (1/month): about 12 min/day
- 24 books/year: about 24 min/day — achievable with a bedtime routine
- 52 books/year (1/week): about 51 min/day — serious commitment, or heavy audiobook use
- 100 books/year: about 99 min/day, over an hour and a half — easier with a mix of shorter books and audiobooks
Longer books or a slower pace raise these times in proportion: the 400-page novel above (9.3 hours at 250 wpm) works out to about 18 min/day for 12 books a year.
In a 2021 Pew Research Center survey, the average (mean) US adult had read about 14 books in the previous 12 months, but the typical (median) adult had read 5. Raising your own number takes conscious planning more than raw speed.
Rereading and deep reading
Plan 20–30% more time for books you intend to reread, annotate, or discuss. Literary classics and philosophical works often reveal more on the second read — the first pass builds the framework, the second explores the meaning. Budget accordingly: a study-group read of Crime and Punishment should be planned for about 13.4–14.6 hours, not the 11.2 hours a first read takes.
Environmental factors
Speed varies with conditions:
- Quiet, good light: baseline speed
- Noisy commute: slower — but still a net win vs not reading
- Tired/late at night: slower, with more rereading
- Phone nearby: effective speed drops sharply due to context switches
If you find reading slow, check the environment first — it's often the ambient distraction, not the reader, that's the limit.
Calculate your reading time
Use our reading time calculator — enter a word count, choose a reading speed (silent non-fiction, fiction, reading aloud, or your own words per minute), and get the total time plus how many days it takes at 20 minutes or an hour a day. Retest your speed periodically to track your improvement.
Sources
- Association for Psychological Science — So Much to Read, So Little Time: How Do We Read, and Can Speed Reading Help? (Rayner et al., 2016)
- Pew Research Center — Three-in-ten Americans now read e-books
- Behavioral Research and Teaching, University of Oregon — An Update to Compiled ORF Norms (Technical Report No. 1702)