Enter your Libby audiobook length, how many days are left on your loan, and how many hours per day you can listen - get the minimum playback speed you need to finish before your loan expires. Also use Tab 2 to find your adjusted listening time at any speed.
The Libby speed calculator is a free tool that finds the minimum playback speed you need to finish a Libby audiobook before your library loan expires. Enter your remaining book length, days left, and daily listening hours - the calculator shows your minimum speed and whether 1x, 1.5x, or 2x is fast enough.
Libby loans run for 7 to 21 days depending on your library. Most audiobooks are 8 to 15 hours long. If you cannot listen every day or can only listen for 1 hour per day, you may need to increase your playback speed to finish in time.
The calculator also includes a basic speed tab for any Libby audiobook - enter the original length and your playback speed to get your exact adjusted listening time and time saved.
Use the loan deadline calculator above to find your exact required speed. The formula is: Minimum Speed = Book Length / (Days Left x Hours Per Day). If your loan expires in 3 days and you can listen 2 hours per day, you have 6 hours available. An 8-hour book at 6 available hours requires a minimum of 1.34x speed.
Standard speed recommendations when your Libby loan is expiring:
Use the main audiobook speed calculator if you want to calculate adjusted times across all speeds side-by-side without the deadline constraint.
To finish a Libby audiobook before the loan expires: (1) calculate your minimum required speed using the tool above, (2) set that speed in the Libby app under Settings > Playback Speed, (3) schedule fixed listening sessions each day, (4) if the required speed exceeds 2x, request a loan extension first.
The two biggest factors that determine whether you can finish are your available hours per day and the remaining book length. Increasing speed is effective up to 2x for most listeners - above 2x, comprehension decreases and you may need to re-listen to sections, which wastes more time than the speed saves.
If the calculator shows you need above 2x, check if your library allows early renewal first. Many Libby libraries allow renewal 3 days before expiry if no holds are waiting - this is faster than trying to rush through at 2.5x or 3x speed.
For a full step-by-step guide, see How to Finish a Libby Audiobook Before the Loan Expires.
The maximum playback speed on Libby is 3x. Libby supports speeds from 0.5x to 3x in 0.1x increments - 26 speed options total. At 3x speed, a 10-hour audiobook takes 3 hours 20 minutes. At 2.5x, it takes 4 hours. At 2x, it takes exactly 5 hours. Libby's maximum of 3x is lower than Audible's 3.5x maximum.
| Libby Speed | 10-hour Book Takes | Time Saved | Best For |
|---|---|---|---|
| 1.0x | 10h 00m | 0 min | First-time complex listens |
| 1.25x | 8h 00m | 2h 00m | Beginners |
| 1.5x ⭐ | 6h 40m | 3h 20m | Most listeners (recommended) |
| 1.75x | 5h 43m | 4h 17m | Experienced listeners |
| 2.0x | 5h 00m | 5h 00m | Loan deadline situations |
| 2.5x | 4h 00m | 6h 00m | Emergency deadline only |
| 3.0x | 3h 20m | 6h 40m | Maximum (trained listeners only) |
For full documentation on Libby's speed settings, see the official Libby help center.
Libby supports 0.5x to 3x speed in 0.1x increments. Audible supports 0.5x to 3.5x in 0.05x increments. Audible has a higher maximum speed (3.5x vs 3x) and finer control (0.05x vs 0.1x steps). Libby is free via library card; Audible requires a paid subscription. For listeners who regularly use 3x or above, Audible is the better platform.
| Feature | Libby | Audible |
|---|---|---|
| Speed Range | 0.5x - 3x | 0.5x - 3.5x |
| Increment | 0.1x steps | 0.05x steps (finer) |
| Max Speed | 3x | 3.5x |
| Cost | Free (library card) | Paid subscription |
| Loan system | 7-21 day loans | No loan limits |
| Speed memory | Per book | Per book |
For a full side-by-side breakdown, see Libby vs Audible Speed Comparison.
To change speed on Libby: open your audiobook → tap the screen to show controls → tap the speed icon (shows "1x" by default) in the bottom control bar → tap your desired speed from the list. The speed setting saves automatically per book. Changes take effect immediately without losing your place.
Libby saves your speed setting per book, not globally. If you switch to a different audiobook, your speed may reset to 1x. You need to set your preferred speed separately for each audiobook you borrow.
Download the Libby app for iOS or Android if you have not already connected your library card.
When a Libby loan expires, the audiobook is automatically returned and removed from your app. Your listening progress is not saved unless you had previously synced. You can place a new hold on the title immediately after return. If no holds are waiting, many libraries allow renewal 3 days before expiry.
Three things to do before your Libby loan expires:
For more detail on Libby loan rules and how long you can borrow, see How Long Can You Keep a Libby Audiobook?
The main calculator works for all platforms — Libby, Audible, Spotify, Apple Books, and more. Enter any duration and get adjusted times at every speed instantly.
Use the Main Audiobook Speed Calculator →