Audiobook Speed Calculator
Calculate your finish time and time saved with custom playback speeds.
Popular Audiobook Speed Calculations
Real listening times for bestselling audiobooks at different speeds. No more guessing — see exactly how long each book takes.
| Book | Original | 1.25x | 1.5x | 1.75x | 2x | Saved at 1.5x |
|---|---|---|---|---|---|---|
Atomic Habits James Clear | 5h 35m | 4h 28m | 3h 43m | 3h 11m | 2h 48m | -1h 52m |
Project Hail Mary Andy Weir | 16h 10m | 12h 56m | 10h 47m | 9h 14m | 8h 5m | -5h 23m |
The Psychology of Money Morgan Housel | 5h 48m | 4h 38m | 3h 52m | 3h 19m | 2h 54m | -1h 56m |
Educated Tara Westover | 12h 10m | 9h 44m | 8h 7m | 6h 57m | 6h 5m | -4h 3m |
Sapiens Yuval Noah Harari | 15h 17m | 12h 14m | 10h 11m | 8h 44m | 7h 39m | -5h 6m |
The 48 Laws of Power Robert Greene | 23h 6m | 18h 29m | 15h 24m | 13h 12m | 11h 33m | -7h 42m |
Durations sourced from Audible. Actual times may vary slightly by edition.
Audiobook Platform Speed Comparison
Not all 1.5x sounds the same. Different platforms use different audio algorithms — here's how they compare.
| Platform | Speed Range | Increments | Max Speed | Pitch Quality | Notes |
|---|---|---|---|---|---|
| Audible | 0.5x – 3.5x | 0.05x | 3.5x | Excellent | Finest speed control (0.05x steps) |
| Apple Books | 0.75x – 2.0x | 0.25x | 2x | Good | Capped at 2.0x — limited for speed listeners |
| Spotify | 0.5x – 3.5x | 0.1x | 3.5x | Very Good | Surprisingly good algorithm since 2023 |
| Libby / OverDrive | 0.6x – 3.0x | Slider | 3x | Good | Continuous slider — flexible but imprecise |
| Google Play | 0.5x – 3.0x | 0.1x | 3x | Good | Solid all-around performer |
| Kobo | 0.5x – 3.0x | 0.1x | 3x | Decent | Quality drops noticeably above 2.0x |
Finest speed control (0.05x steps)
Capped at 2.0x — limited for speed listeners
Surprisingly good algorithm since 2023
Continuous slider — flexible but imprecise
Solid all-around performer
Quality drops noticeably above 2.0x
Speed data verified as of January 2025. Platform features may change with app updates.
How Audiobook Listeners Actually Listen
Data-driven insights from audiobook speed calculations — not guesses, not surveys, but actual usage patterns.
Most users settle between 1.25x and 1.75x — not the 2.0x that speed-listening evangelists recommend.
The typical audiobook calculated here is 11.2 hours — longer than the industry average of 9 hours, suggesting power listeners gravitate toward longer titles.
At the average chosen speed of 1.47x, listeners save 3.7 hours per book — that's 44 hours/year if you read 12 books.
Only 18% go above 2.0x. The "sweet spot" is narrower than most speed-listening advice suggests.
Based on aggregated, anonymous calculation data. No personal information is collected or stored.