Audiobook Speed Calculator

Calculate how long an audiobook takes at different playback speeds. Enter the total length and see listening times for 1x, 1.25x, 1.5x, 2x, and custom speeds.

Audiobook Length
Custom Speed
x

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Instant Speed Comparison

See listening times for 1x, 1.25x, 1.5x, 1.75x, 2x, 2.5x, and 3x speeds side by side. Compare time saved at each speed instantly.

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Custom Speed Slider

Set any playback speed from 0.5x to 4x with a smooth slider. Fine-tune to the exact speed your audiobook app supports.

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100% Private

All calculations run in your browser. No data is sent to any server. Your listening habits stay completely private.

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Frequently Asked Questions

How does audiobook playback speed work?
Audiobook playback speed multiplies the rate at which audio plays back. At 1.5x speed, a 10-hour audiobook would finish in about 6 hours and 40 minutes. At 2x speed, it would take just 5 hours. The formula is simple: divide the original length by the speed multiplier to get your actual listening time.
What is the best speed for listening to audiobooks?
Most people find 1.25x to 1.5x comfortable for everyday listening. Fiction and complex non-fiction are best at 1x to 1.25x for maximum comprehension. Lighter non-fiction and familiar topics work well at 1.5x to 2x. Start at a slower speed and gradually increase as your ear adjusts to faster narration.
How much time do I save at 1.5x speed?
At 1.5x speed, you save one-third of the original listening time. For example, a 12-hour audiobook takes only 8 hours at 1.5x speed, saving you 4 hours. A 30-hour audiobook takes 20 hours, saving 10 hours. This makes it one of the most popular speed choices for regular audiobook listeners.
Can I listen to audiobooks at 3x or 4x speed?
While most audiobook apps support speeds up to 3x or higher, comprehension drops significantly above 2x for most listeners. Some experienced speed listeners can handle 2.5x to 3x with practice. Speeds above 3x are generally only useful for skimming or reviewing content you have already heard before.
How do I calculate audiobook listening time manually?
Divide the total audiobook length by the playback speed. For example, a 15-hour audiobook at 1.5x speed: 15 / 1.5 = 10 hours. At 2x speed: 15 / 2 = 7.5 hours (7 hours and 30 minutes). This calculator handles the math automatically, including hours, minutes, and seconds.