What is the Download Time Calculator?
Estimate how long a file takes to download or upload at a given connection speed.
Enter file size, size unit and connection speed and the Download Time Calculator returns download time, speed in megabytes per second and data per hour at this speed. Results update as you type, and nothing you enter leaves your device.
How it is calculated
Time (seconds) = file size (megabits) ÷ speed (megabits per second)
1 MB = 8 megabits
How to use it
- Enter file size.
- Choose size unit.
- Enter connection speed in Mbps.
- Read download time in the results panel. It updates as you type.
- Change any value to compare scenarios, or use Share to send the result as a link.
Worked example
Common questions
What formula does the Download Time Calculator use?
It uses: Time (seconds) = file size (megabits) ÷ speed (megabits per second); 1 MB = 8 megabits.
What do I need to use the Download Time Calculator?
You need file size, size unit and connection speed. Sensible starting values are filled in so you can see how it works straight away.
Is the Download Time Calculator free, and is my data stored?
It is free with no sign-up. The calculation runs in your browser, so the values you enter are not sent to or stored on our server.