Many sources of media such as YouTube, podcast apps, and audiobooks allow you to adjust the speed of playback.
This of course changes the amount of time it takes to play back the media.
This calculator takes the normal playback time in minutes and calculates the new playback time according to the selected playback speed.
Playback Speed Calculator
This project was created primarily for personal use/amusement. Hopefully you can get some benefit from it as well!