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Export File Size from Bitrate

Convert a video bitrate and duration into the resulting export file size.

About Export File Size from Bitrate

Multiplying the bitrate in megabits per second by the duration in seconds and dividing by eight gives the megabyte file size. Knowing the final size in advance helps you budget storage and upload time before export finishes.

Formula

Export File Size from Bitrate

Size = bitrate x seconds / 8

bitrate
Data rate of the encoded video

Worked example

With the default values below, Export File Size from Bitrate returns File Size of 0.88. Change any input above and every figure here is recalculated in your browser.

Inputs used

Bitrateminimum 0.1
12
Durationminimum 1
10

Results

File Size
0.88 GB
File Size in MB
900.00 MB
File Size in KB
921,600.00 KB

Step by step

  1. 1Values used
  2. 2Export File Size from Bitrate
  3. 3File Size= 0.88 GB
  4. 4File Size in MB= 900.00 MB
  5. 5File Size in KB= 921,600.00 KB

Assumptions and limits

  • The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is Export File Size from Bitrate calculated?

Size = bitrate x seconds / 8 Multiplying the bitrate in megabits per second by the duration in seconds and dividing by eight gives the megabyte file size.

Why does Export File Size from Bitrate matter?

Knowing the final size in advance helps you budget storage and upload time before export finishes.

What values do I need to enter?

This calculator takes 2 inputs: Bitrate, Duration. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.

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