01 / PLAN YOUR TIME

Playback speed calculator

Know how much listening time you need. Add a recording or a list, set your speed, and allow for what you have already played.

Free to useNo account needed

Enable JavaScript to use the interactive tool. The method and worked example are available below.

Your recording

Example: a 90-minute recording at 1.5×. Change any value to try your own.

Original recording duration

Use 0 for unused fields. Minutes and seconds must be below 60.

Multiplier from 0.1× to 16×. Choose a preset or type your own.

Already started listening?
Already played on the original timeline

Use the position shown on the original recording, not the real time you spent listening. Use 0 for unused fields.

Remaining listening time

1h

at 1.5× playback speed

Original recording
1h 30m
Already played
0s
Original time remaining
1h 30m
Time saved
30m

1h 30m of original content ÷ 1.5 = 1h of listening. Time saved is compared with playing the remaining content at 1×.

Pauses and replay are not included. Displayed times are rounded to the nearest second. This calculator does not change your audio.

Runs in this browser. Your inputs are not uploaded or saved automatically.
HOW IT WORKS

The time, without the guesswork.

01

Start with the original recording

Use the duration shown at normal speed. If you are partway through, enter the position shown on the recording’s timeline, rather than how long you have been listening.

02

Divide the remaining content by the speed

Remaining listening time = (original duration − played position) ÷ playback speed. Slower speeds add time; faster speeds reduce it. Pauses and replaying sections are not included.

03

For a queue, add the durations first

Add each recording on its own line. The calculator totals the durations before dividing, so small rounding differences do not accumulate across a long list.

A WORKED EXAMPLE

A 90-minute lecture

90 minutes ÷ 1.5 = 60 minutes

At 1.5×, a 90-minute recording takes one hour. If you have already reached the 30-minute mark, the remaining content takes 40 minutes at the same speed.

Put it into practice

Make the listening time useful.

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