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File Upload Duration from Transfer Rate

Estimate upload duration from decimal file size and effective upload bitrate, or solve the required bitrate or transferred size.

  • Formula & worked example
  • Private in your browser
  • No signup
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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Private by default

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

Formula and method

Uploading 100 MB at a sustained 10 Mb/s takes 80 seconds before additional setup time or overhead.

Upload duration = file size in bits / effective bits per second

Worked example

Enter these known values and leave the other values blank.

File size
100 MB
Sustained effective upload rate
10 Mbit /s
Estimated transfer duration
0:1:20 hrs / min / sec

Assumptions and limitations

  • The upload rate stays constant and represents useful file data delivered per second. Protocol overhead, congestion, retries and pauses are excluded.
  • The offered file-size units use decimal prefixes: 1 MB = 1,000,000 bytes. Bitrate units are bits per second, with eight bits per byte.
  • All three quantities must be positive. Long duration conversions use the captured fixed month and year factors rather than calendar dates.

Common questions

Why is 100 MB at 10 Mb/s longer than ten seconds?

The file size is in bytes and the rate is in bits. Convert 100 MB to 800 megabits, then divide by 10 megabits per second.

References

The calculation equations, inverse formulas, units, and input rules were imported from this source. Bookify provides the interface and equation solver.

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