Worldnet Bandwidth Test

Worldnet Bandwidth Test tool is an excellent tool for measuring maximum bandwidth. It uses iPerf3 to perform speed test, one of the most popular tools for analysing and benchmarking network performance. Worldnet Bandwidth Test provides more accurate result for high-speed broadband like UFB.

We no longer offer Flash/HTML5 speed test due to its inaccuracy and other factors affecting the result.

To perform speed test using Worldnet Bandwidth Test, please follow below steps:

  1. Download Worldnet Bandwidth Test and unzip to a folder.
  2. Run "WorldnetBWTest.exe"
  3. Close all applications running on your computer and turn off all downloads before executing this test.
  4. Click "Start" button and wait for about 10 seconds.
  5. The result will appear when the test completes, scroll down to bottom of the result. Last two lines starting with [SUM] are the average bandwidth measured from the Worldnet speedtest server and PC running the program.

Example - Fibre 100Mbps test result:

[ ID] Interval           Transfer     Bandwidth       Retr
[  2]   0.00-10.00  sec  23.2 MBytes  19.5 Mbits/sec   14	sender
[  2]   0.00-10.00  sec  23.0 MBytes  19.3 Mbits/sec		receiver
[  4]   0.00-10.00  sec  25.6 MBytes  21.5 Mbits/sec   51	sender
[  4]   0.00-10.00  sec  25.4 MBytes  21.3 Mbits/sec		receiver
[  6]   0.00-10.00  sec  27.5 MBytes  23.0 Mbits/sec   38	sender
[  6]   0.00-10.00  sec  27.4 MBytes  23.0 Mbits/sec		receiver
[  8]   0.00-10.00  sec  28.9 MBytes  24.3 Mbits/sec   59	sender
[  8]   0.00-10.00  sec  28.8 MBytes  24.2 Mbits/sec		receiver
[SUM]   0.00-10.00  sec   105 MBytes  88.2 Mbits/sec  162	sender
[SUM]   0.00-10.00  sec   105 MBytes  87.8 Mbits/sec		receiver
  • If you get "iperf3: error - the server is busy running a test. try again later" message, then select different Bandwidth server port and click Start button again..
  • Worldnet Bandwidth Test uses standard TCP protocol to measure the throughput and typically it reflects about 85-90% of the maximum speed. The difference is largely due to TCP algorithm features such as acknowledgments, number of packets to send according to latency, dropped packets etc.