Audio Speed Changer

Summary

Enter audio duration and a speed multiplier to instantly see the new playback length, plus a full reference table of common speeds.

How it works

1. Enter the original audio duration in hours, minutes, and seconds.
2. Enter the playback speed multiplier (e.g. 1.5 for 50% faster).
3. The calculator divides the original duration by the speed to get the new length.
4. A reference table shows new duration for 0.5x, 0.75x, 1x, 1.25x, 1.5x, 1.75x, 2x, 2.5x, and 3x.
5. All calculations run instantly in your browser with no data sent to any server.

Use cases

• Estimate how long a podcast episode takes at 1.5x or 2x speed.
• Plan a listening session when you have limited time.
• Find the fastest speed that still fits within a commute or workout.
• Compare duration savings across multiple speed settings side by side.
• Calculate lecture playback time for exam prep on a tight schedule.
• Determine how long a slow-motion clip will appear when exported at reduced speed.

Frequently Asked Questions