Free listening tool
Enter the book’s full runtime and your playback speed. We’ll calculate your actual listening time and exactly how much time you save.
The simple formula
A 14-hour audiobook played at 1.5× takes 9 hours and 20 minutes. At 2×, it takes 7 hours. The calculator handles the hours and minutes for you, including less tidy runtimes and custom speeds.
Playback speed changes how long you spend listening; it does not change the audiobook’s published runtime. Keeping those numbers separate is useful when you want an honest record of both the story and your own time.
| Speed | Listening time |
|---|---|
| 1× | 14h |
| 1.25× | 11h 12m |
| 1.5× | 9h 20m |
| 1.75× | 8h |
| 2× | 7h |
Beyond one calculation
Booktrace remembers the speed you actually use, records individual listening sessions, keeps your chapter, and shows both book time and your time. It turns a quick calculation into a listening history you can return to.
Common questions
Six hours and 40 minutes. Divide 10 hours by 1.5.
It cuts the listening time in half. A 12-hour audiobook takes 6 hours at 2×.
No. It is 50% faster, which reduces the time by one third. A 9-hour book takes 6 hours.
Yes. Enter any speed from 0.5× through 4×, including values such as 1.35× or 1.8×.
