Overview
Enter a video, podcast, or audiobook's original duration (in hours, minutes, and seconds) and a playback speed multiplier to see the adjusted duration and how much time you save. Adjusted duration = Original duration ÷ Speed, and Time saved = Original duration − Adjusted duration. Durations are handled as whole seconds internally and rounded before display, so results always read as a clean "Xh Ym Zs" rather than a floating-point artifact like "39.999s" that can appear when dividing an odd duration by a speed like 1.5x. Useful for estimating how much time a 1.25x, 1.5x, or 2x playback speed actually saves across a long lecture series, podcast backlog, or audiobook. Runs entirely client-side.
Best for: Estimating how much time a faster podcast, video, or audiobook playback speed actually saves
How to use this tool
- Enter the original duration. Hours, minutes, and seconds fields - fill in whichever apply, blank fields default to zero.
- Enter the playback speed. A multiplier greater than zero, such as 1.25, 1.5, or 2.
- Read the adjusted duration and time saved. The new, shorter duration at that speed, and exactly how much time it saves versus the original.
Frequently asked questions
Dividing an arbitrary duration by a speed like 1.5x rarely produces a whole number of seconds internally. The calculator rounds to the nearest whole second before formatting the result, so you see a clean value like "1h 20m 0s" instead of a floating-point artifact like "1h 19m 59.999s".
Any speed greater than zero, including fractional values like 0.75x (slower than normal) as well as speeds faster than 1x. A speed of zero or a negative value is rejected, since it doesn't correspond to a real playback rate.
No - it purely divides the original duration by the speed multiplier. Any time you separately skip (intros, ads, pauses) isn't part of this calculation and would need to be subtracted from the original duration yourself before entering it.