Playback Speed Calculator

Calculate time saved and new duration at any playback speed — works for audiobooks, podcasts, lectures and video.

Playback Speed Calculator

Calculate time saved and new duration at any playback speed — works for audiobooks, podcasts, lectures and video.

Original duration

Speed

Enter values above and click Calculate — results will appear here with the formula explained.

New = original / speed; Saved = original - new; Saved % = (1 - 1/speed)×100

How does this work?

Playback speed is a simple division. At 2×, a 60-minute lecture takes 30 minutes, saving 50%. At 1.5×, saving is 33.3%.

Works for any timed media: audiobooks, podcasts, YouTube, lectures. The math is identical.

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Quick Answer

Playback Speed Calculator: Calculate time saved and new duration at any playback speed — works for audiobooks, podcasts, lectures and video. Formula: New = original / speed. Example: 2 hours 30 minutes at 1.

How to Use This Calculator

1Enter original duration (2:30 or 2.5).
2Set playback speed (0.5× to 4×).
3See new duration, time saved and percent saved.

Formula Used

New = original / speed; Saved = original - new; Saved % = (1 - 1/speed)×100

Playback speed is a simple division. At 2×, a 60-minute lecture takes 30 minutes, saving 50%. At 1.5×, saving is 33.3%.

Works for any timed media: audiobooks, podcasts, YouTube, lectures. The math is identical.

AdSense ready — add NEXT_PUBLIC_GOOGLE_ADSENSE_PUBLISHER_ID

728×90 — AdSense

Worked Example

2 hours 30 minutes at 1.5× = 1 hour 40 minutes, saving 50 minutes (33%). At 2× = 1 hour 15 minutes, saving 1 hour 15 minutes (50%).

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Frequently Asked Questions

QWhat does 2× save?

50% of original. 1.5× saves 33%, 1.25× saves 20%.

QCan I slow down?

Yes, 0.75× makes 1 hour become 1 hour 20 minutes — useful for language learning.

QDoes pitch change?

Modern players preserve pitch. Old players made voices chipmunk-like at high speed.

Playback Speed Calculator

Calculate time saved and new duration at any playback speed — works for audiobooks, podcasts, lectures and video.