What is upload time?

Upload time is how long it takes to send a file from your device to a server, such as a cloud drive, an email service, or a video platform. It depends mostly on the size of the file and on your upload speed, which is usually much lower than your download speed on home connections.

Tool description

This calculator estimates how long a file will take to upload. Select a file, enter your upload speed, and the tool works out the time from the exact size of the file. The file is only read locally in your browser to get its size; nothing is uploaded.

Examples

File size Upload speed Estimated time
100 MB 20 Mbps 40 s
1 GB 20 Mbps 6 m 40 s
5 GB 100 Mbps 6 m 40 s
50 GB 1 Gbps 6 m 40 s

Features

  • Pick a file with the file selector or drag and drop it
  • Choose a metric (1000), binary (1024), or mixed measurement system, like the manual Upload Time Calculator
  • Speed units from bits and bytes up to petabits and petabytes per second
  • Results update instantly when you change the file, speed, or unit

How it works

The tool divides the file size in bytes by your speed converted to bytes per second. Speeds in bits are divided by 8 to get bytes. Internet providers use metric units (multiples of 1000), so that is the best choice for connection speeds, while binary units (multiples of 1024) match how some operating systems show file sizes.

Tips

  • Internet plans are advertised in megabits per second (Mbps), while file sizes are shown in megabytes (MB), so a 100 Mbps connection moves at most 12.5 MB per second
  • Check your real upload speed with a speed test, since it is often lower than the advertised value
  • Real uploads are usually slower than the estimate because of protocol overhead, Wi-Fi quality, server limits, and other devices on your network
  • Compressing or zipping a file first can reduce upload time