How playback speed calculator works
The math is one division: new duration = original duration / speed. A 60-minute episode at 1.5x takes 40 minutes; at 2x it takes 30. Speed multipliers work the other way from what intuition sometimes suggests — a bigger number means less time, because you are consuming more content per minute. Below 1x the duration grows: 0.5x doubles it, which is exactly how transcription workflows use slow playback.
Enter the original length in hours, minutes and seconds plus any speed from 0.1x to 10x. The tool shows the new duration, the exact time saved (which goes negative below 1x, because slowing down costs time rather than saving it), and the percentage saved. A comparison table fills in the standard app speeds — 1x, 1.25x, 1.5x, 1.75x, 2x, 2.5x, 3x and the slow side — so one entry answers every setting your player offers.
Numbers land on clean values more often than you would expect: 1.25x saves exactly 20% of the runtime, 1.5x saves a third, 2x saves half. Those fractions make mental math easy, and the calculator's exact seconds confirm what your player's rounded display can only approximate — useful when you are planning what fits into a commute or a study block.