Internet Speed Test in Python — speedtest-cli Example

A short Python script that tests your internet speed — download, upload, and ping — using the speedtest-cli library and Speedtest.net servers.

Overview

This script connects to the best available Speedtest.net server, runs a full speed test, and prints the results to the console.

Features

  • Automatically selects the best available test server
  • Measures download speed (Mbps)
  • Measures upload speed (Mbps)
  • Reports ping latency (ms)
  • Displays the selected server’s host, country, and sponsor

Requirements

speedtest-cli

Install the dependency:

pip install speedtest-cli

Usage

From the Console_Code folder:

python SpeedTest.py

Example Output

The numbers below are illustrative; the text matches what the script prints.

Loading servers
Calulating download speed...
Calulating upload speed...
Calulating ping result...

Choose best server example.server.net located at United States Sponsor by Example ISP
Download    : 95.42 Mbps
Upload      : 48.17 Mbps
Ping        : 12.34 ms

File Structure

Internet Speed Test/
└── Console_Code/
    └── SpeedTest.py    # Main script

Note on the reported units

speedtest-cli returns speeds in bits per second. The script’s bytes_to_mb helper divides by powers of 1024 and always appends Mbps, so a result shown as “90.6 Mbps” is about 95 megabits per second in the usual decimal sense (roughly 4.6% higher). Very slow connections, below 1,048,576 bit/s, are shown in kilobit units but are still labelled Mbps. Dividing by 1_000_000 gives standard Mbps.

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