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Video Duration Calculator

How long a video runs from its file size and bitrate, or how much fits in a space.

Enter values

Results update as you type.

Result

Duration

22 min 54 s

In minutes
22.91
In hours
0.382
In seconds
1,374.4
Frames at 24 fps
32,985
Frames at 30 fps
41,232
Size per minute
178.81 MB

About the Video Duration Calculator

How long a video runs from its file size and bitrate, or how much fits in a space.

Also known as: video length from size, how long is my footage, runtime calculator, footage duration.

How to use this calculator

  1. Enter file size, total bitrate.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

seconds = file size in bits ÷ bitrate in bits per second

Worked example

Using the values pre-filled in the calculator above:

  • File size = 4 GB
  • Total bitrate = 25 Mbps

the calculator returns:

  • Duration: 22 min 54 s
  • In minutes: 22.91
  • In hours: 0.382
  • In seconds: 1,374.4