Book Reading Time Calculator
Calculate how long it takes to read a book based on page count, words per page, and your reading speed in WPM.
Book Reading Time Formula
The time it takes to read a book depends on three things: the total number of words, your reading speed, and the complexity of the material.
The Formula
Reading Time (minutes) = Total Words / Reading Speed (WPM)
Total Words = Page Count × Words Per Page
Where:
- WPM = words per minute (your personal reading speed)
- Words per page = varies by book format (typically 200–300 for printed books)
Average Reading Speeds by Skill Level
| Reader Type | Speed (WPM) | Description |
|---|---|---|
| Slow reader | 100–150 | Careful, deliberate reading |
| Average adult | 200–250 | Most people fall in this range |
| Above average | 300–400 | Experienced, frequent readers |
| Fast reader | 400–600 | Well-practiced speed readers |
| Speed reader | 600–1000 | Trained speed reading techniques |
| World record | 4,700 | Howard Berg (with comprehension) |
The average adult reads at approximately 238 WPM according to a 2019 meta-analysis published in the Journal of Memory and Language. Comprehension drops significantly above 600 WPM for most people.
Words Per Page by Format
| Format | Words Per Page |
|---|---|
| Mass market paperback | 250–300 |
| Trade paperback | 250–280 |
| Hardcover fiction | 250–300 |
| Academic textbook | 300–400 |
| Children’s chapter book | 150–200 |
| Large print | 150–180 |
| Comic/graphic novel | 50–100 |
| E-reader (default settings) | 200–250 |
Worked Example
A 350-page novel with 260 words per page, reader speed 300 WPM:
Total words = 350 × 260 = 91,000 words Reading time = 91,000 / 300 = 303 minutes = 5 hours 3 minutes
At the average speed of 238 WPM: Reading time = 91,000 / 238 = 382 minutes = 6 hours 22 minutes
Factors That Affect Reading Speed
- Material complexity: Technical or academic text is 30–50% slower than fiction
- Familiarity: Reading in your area of expertise is faster than unfamiliar topics
- Font size and formatting: Cramped text or unusual fonts slow reading by 10–20%
- Reading environment: Distractions, noise, and poor lighting reduce speed
- Time of day: Most people read fastest in the morning
- Screen vs. paper: Studies show paper reading is typically 5–10% faster than screen reading
How to Measure Your WPM
- Pick a page of average difficulty
- Set a timer for exactly 1 minute
- Read normally (don’t rush)
- Count the words you covered
- Repeat 3 times and average the results