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Calculator Tools
Data & Digital Storage Calculators

Download Time Calculator

How long a file takes to download at a given connection speed, allowing for real-world overhead.

Enter values

Results update as you type.

Result

Download time

7 min 24 s

In seconds
444.4
Effective speed
11.25 MB/s
At full advertised speed
6 min 40 s
File size
5 GB

About the Download Time Calculator

How long a file takes to download at a given connection speed, allowing for real-world overhead.

Also known as: file download time, how long to download, transfer time calculator, upload-time.

How to use this calculator

  1. Enter file size, size unit, connection speed, speed unit and the other fields.
  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

time = file size ÷ (speed × (1 − overhead))

Worked example

Using the values pre-filled in the calculator above:

  • File size = 5
  • Size unit: GB
  • Connection speed = 100
  • Speed unit: Mbps (megabits/s)
  • Protocol overhead = 10 %

the calculator returns:

  • Download time: 7 min 24 s
  • In seconds: 444.4
  • Effective speed: 11.25 MB/s
  • At full advertised speed: 6 min 40 s