Audiobook Speed Calculator: 1.5x, 2x time saved

Every speed at a glance
Speed	Listening time	Time saved
1×	10 h	—
1.25×	8 h	2 h
1.5×	6 h 40 min	3 h 20 min
1.75×	5 h 42 min	4 h 17 min
2×	5 h	5 h
2.25×	4 h 26 min	5 h 33 min
2.5×	4 h	6 h
2.75×	3 h 38 min	6 h 21 min
3×	3 h 20 min	6 h 40 min

Every speed at a glance

Speed

Listening time

Time saved

1×

10 h

—

1.25×

8 h

2 h

1.5×

6 h 40 min

3 h 20 min

1.75×

5 h 42 min

4 h 17 min

2×

5 h

2.25×

4 h 26 min

5 h 33 min

2.5×

4 h

6 h

2.75×

3 h 38 min

6 h 21 min

3×

3 h 20 min

6 h 40 min

4 simple steps.

Enter the length

Type the audiobook’s length at normal speed, in hours and minutes.

Spin the dial

Drag the record or tap a preset to choose your playback speed.

Read your time

See exactly how long the book takes and how much time you save.

Share it

Copy the link to send the result to a friend or your book club.

How playback speed changes listening time

Listening time is simply the audiobook’s length divided by your playback speed. The formula is:

listening time = length ÷ speed and time saved = length − listening time

So a 12-hour book at 1.5× takes 8 hours, and you save 4 hours. Every speed-up saves a fixed share of each hour: 12 minutes at 1.25×, 20 minutes at 1.5×, 25.7 minutes at 1.75× and 30 minutes at 2×.

Common audiobook lengths at 1.5× and 2×

Length at 1×	At 1.5×	At 2×
8 h	5 h 20 min	4 h
10 h	6 h 40 min	5 h
12 h	8 h	6 h
15 h	10 h	7 h 30 min
20 h	13 h 20 min	10 h
30 h	20 h	15 h

Finding your best speed

Comprehension stays high for most people up to about 1.5×, especially with a clear narrator. Dense non-fiction, poetry and books with many characters reward slower speeds, while thrillers, re-listens and familiar topics handle faster ones well. A good habit is to raise your speed by 0.1× at a time and stay there for a week before going faster.

1.0–1.25×: performance-led fiction, memoir, full-cast productions.
1.25–1.5×: the sweet spot for most fiction and narrative non-fiction.
1.75–2×: familiar topics, business books, re-listens.
2× and above: experienced listeners and skimming.

Questions, answered.

How long is a 10-hour audiobook at 1.5x speed?

A 10-hour audiobook takes 6 hours 40 minutes at 1.5x speed, saving 3 hours 20 minutes. At 2x it takes 5 hours.

How do you calculate audiobook listening time at a faster speed?

Divide the length by the speed. For example, 12 hours 30 minutes is 750 minutes; at 1.5x that is 750 ÷ 1.5 = 500 minutes, or 8 hours 20 minutes. Time saved is the original length minus the new length.

What is the best speed to listen to audiobooks?

Most regular listeners settle between 1.25x and 1.5x. Fiction and memoir with a strong narrator often work best near normal speed, while familiar non-fiction or re-listens can go faster. Try raising the speed by 0.1x each week to train your ear.

Does speeding up an audiobook change the narrator’s pitch?

No. Modern audiobook apps, including Audible, Apple Books, Spotify and Libby, use time-stretching, which changes speed without making the voice higher.

How many minutes do I save per hour at 2x?

At 2x you save 30 minutes for every hour of audio. At 1.5x you save 20 minutes per hour, and at 1.25x you save 12 minutes per hour.

How fast is narration in words per minute?

Audiobook narration usually runs at about 150 to 160 words per minute. At 1.5x that becomes roughly 225 to 240 words per minute, close to a comfortable silent reading pace for many people.