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Playback Speed Calculator

How long is a 2 hour video at 1.5x or 2x speed? Stop guessing — enter any video or audio duration, pick a playback speed, and instantly see the exact new duration and time saved. Works for YouTube, podcasts, audiobooks, online courses & lectures.

Use the pickers (easiest). Or paste from a player if you want.
Paste a duration instead (mm:ss or hh:mm:ss)
Press Enter or click outside the field to apply.
Examples: 1.25, 1.5, 2
Tip: 1.5x saves ~33%; 2x saves 50%.
New duration
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Time saved
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Percent saved
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Speed comparison table

Same duration, multiple speeds. Useful when choosing between 1.5x and 2x.

Speed New duration Time saved
Set a duration to see the table.

Popular Speed Calculations

Click any example to fill the calculator instantly.

How Does Playback Speed Work?

When you increase the playback speed of a video or audio file, the player compresses the content into a shorter time frame. The formula is simple: New duration = Original duration ÷ Speed.

For example, a 2 hour video at 2x speed takes exactly 1 hour. A 1 hour video at 1.5x speed finishes in 40 minutes, saving you 20 minutes.

How Much Time Does Each Speed Save?

  • 1.25x speed saves 20% of total time — ideal for lectures where you need to absorb details
  • 1.5x speed saves 33% — the most popular choice for podcasts and YouTube videos
  • 1.75x speed saves 43% — great for review sessions and familiar content
  • 2x speed saves 50% — cuts your watch time in half
  • 2.5x speed saves 60% — for experienced speed listeners
  • 3x speed saves 67% — for quick overviews and skimming

Where Can You Change Playback Speed?

Most platforms support speed adjustment: YouTube (0.25x–2x), Spotify podcasts (0.5x–3.5x), Audible audiobooks (0.5x–3.5x), VLC player, and most online course platforms like Coursera, Udemy, and Khan Academy.

Quick Answers: Common Speed Questions

Answers to the most searched playback speed questions.

How long is a 2 hour video at 2x speed?

A 2 hour video at 2x speed takes exactly 1 hour. You save 1 full hour.

How long is a 2 hour video at 1.5x speed?

A 2 hour (120 min) video at 1.5x speed takes 1 hour 20 minutes. You save 40 minutes.

If I watch a 2 hour video at 3x speed, how long?

At 3x speed, a 2 hour video takes only 40 minutes. You save 1 hour 20 minutes.

How long is a 1 hour video at 1.25x speed?

A 1 hour video at 1.25x speed takes 48 minutes. You save 12 minutes.

How much faster is 1.5x speed?

At 1.5x speed, content plays 50% faster than normal, meaning you save 33% of the total watch time. A 60-minute video becomes 40 minutes.

How much time does 1.25x speed save?

1.25x speed saves 20% of the total duration. For a 1-hour video, that's 12 minutes saved. It's subtle enough that most people can still follow along easily.

Does playback speed affect watch time?

On platforms like YouTube, watch time is counted based on the actual content viewed, not clock time. Watching at 2x speed still counts as watching the full video for the creator's analytics.

Frequently Asked Questions

What does this playback speed calculator do?
This free playback speed calculator tells you exactly how long a video or audio will take at any speed (1.25x, 1.5x, 1.75x, 2x, 2.5x, 3x) and how much time you save. Enter a duration, pick a speed, and get instant results.
Is the time saved calculation accurate?
Yes. We compute the result in seconds and round to the nearest second. The formula is: New duration = Original duration ÷ Speed. Players may display slightly different rounding, but the math is exact.
Which playback speeds are most common?
The most popular playback speeds are 1.25x, 1.5x, 1.75x, and 2x. For YouTube and podcasts, 1.5x and 2x are the most used. Use the speed comparison table above to see how each speed affects your specific duration.
Can I share a calculation with someone?
Yes! Click "Copy shareable link" and send it. The link includes your duration and speed as URL parameters, so the recipient sees the same result.
How do I calculate video playback time at different speeds?
Divide the original duration by the speed multiplier. For example: a 2 hour video at 1.5x speed = 120 min ÷ 1.5 = 80 minutes (1 hour 20 min). Or simply enter the values in our calculator above for instant results.
Does this work for YouTube, Spotify, and Audible?
Yes. The math is universal — our calculator works for any platform that supports playback speed adjustment, including YouTube, Spotify podcasts, Audible audiobooks, VLC, Coursera, Udemy, and more.
What is the best playback speed for learning?
Research suggests 1.25x to 1.5x speed is optimal for learning retention. At these speeds, you save 20–33% of time without significant comprehension loss. For review or familiar material, 1.75x to 2x works well.
How long is a 30 minute video at 1.5x speed?
A 30 minute video at 1.5x speed takes exactly 20 minutes. You save 10 minutes.