RandoziPlayback Speed Time Calculator
Enter the length of a podcast, a video or an audiobook and the speed you play it at. You get the new playing time, the time saved and the share saved, a table of the usual speeds from 1.25× to 3×, and the total for a whole list of episodes.
Playing time at 1.5× speed
40 min
0:40:00 · saves 20 min (33.33 %) · original 1 h
The same duration at the usual speeds
| Speed | Playing time | Saved | Share |
|---|---|---|---|
| 1.25× | 48 min | 12 min | 20 % |
| 1.5× | 40 min | 20 min | 33.33 % |
| 1.75× | 34 min 17 s | 25 min 43 s | 42.86 % |
| 2× | 30 min | 30 min | 50 % |
| 2.5× | 24 min | 36 min | 60 % |
| 3× | 20 min | 40 min | 66.67 % |
Playing time = original duration ÷ speed, at a constant speed. Pauses, ads, parts you skip and silence trimming are not counted. Type any speed from 0.25 to 4 in the field. Nothing you type leaves your browser.
How it works
- Choose One duration and type hours, minutes and seconds, or choose Several durations and write one per line.
- Type the playback speed, from 0.25 to 4.
- Read the playing time at that speed, the time saved and the percentage.
- Look at the table to compare the usual speeds, then copy the summary.
What people use it for
A podcast backlog
Add up a dozen episodes and see whether the total fits in a week of commutes at 1.5×.
Course videos and lectures
Find how long a 6-hour course lasts at 2× before you plan your study time.
An audiobook
See how many hours a long audiobook takes at 1.25× and at 1.75×.
Questions
- How is the time calculated?
- Playing time = original duration ÷ speed. Time saved = original duration − playing time, and the share saved = (speed − 1) ÷ speed. At 1.5× a 60-minute episode lasts 60 ÷ 1.5 = 40 minutes: 20 minutes saved, 33.33 %. A speed below 1 makes the recording longer, and the page then shows the time added instead.
- Which formats can I write?
- One duration per line, up to 200 lines. Use h:mm:ss (1:30:00), mm:ss (45:00: with a single colon the first number is minutes), or numbers followed by units such as 90m, 1h30m, 1h 30m 15s, 1.5 hours or 45s. A number without a unit is refused because it could be minutes or seconds. After a colon, minutes and seconds must be below 60.
- What does the page not count?
- It assumes a constant speed from the first second to the last. Pauses, ads, parts you skip and any silence-trimming feature of your player change the real time, and the page does not know them. Durations are rounded to the second on screen.
- Which speeds can I enter?
- Any value from 0.25 to 4, with decimals if you like, such as 1.35. Your own player may offer fewer steps or a lower maximum, so check what it allows.