Based on earlier tests the assumption is that the ISP in use delivers a download speed of 56Mbps, while 50Mbps must be delivered contractually.

All tests have been done with Google Chrome on a wired Windows computer.

In a graph these are the test results:

There are 6 speed tests which give an downloadspeed in the range 54-56Mbps.

There are 10 speed tests which give an downloadspeed in the range 50-52Mbps.

There is 1 speed test which give an downloadspeed in the range 50-56Mbps (actually 50-100Mbps).

## Detailed results per speed test

### Bandwidth Place

- 46,96Mbps
- 46,24Mbps
- 46,19Mbps

That gives an average of 46,5Mbps and a standard deviation of 0.43Mbps for the downloadspeed.

### Broadband Speed Checker

- 48,30Mbps
- 50,78Mbps
- 51,17Mbps

That gives an average of 50,4Mbps and a standard deviation of 0.99Mbps for the downloadspeed.

### Cloudfare

- 45,9Mbps
- 48,0Mbps
- 47,7Mbps

That gives an average of 47,2Mbps and a standard deviation of 1,14Mbps for the downloadspeed.

### Comparitech

- 55,31Mbps
- 55,25Mbps
- 54,61Mbps

That gives an average of 55.1Mbps and a standard deviation of 0.39Mbps for the downloadspeed.

### DSLReports

- 51,8Mbps
- 50,3Mbps
- 50,7Mbps

That gives an average of 50,9Mbps and a standard deviation of 0.78Mbps for the downloadspeed.

### Fast

- 46Mbps
- 42Mbps
- 45Mbps

That gives an average of 44Mbps and a standard deviation of 2.1Mbps for the downloadspeed.

### Fireprobe

- 51.40Mbps
- 51.24Mbps
- 50.21Mbps

That gives an average of 51.0Mbps and a standard deviation of 0.65Mbps for the downloadspeed.

### Google Fiber

- 51.1Mbps
- 51.3Mbps
- 51.7Mbps

That gives an average of 51.4Mbps and a standard deviation of 0.31Mbps for the downloadspeed.

### Internet Speed at a Glance

- 50..100Mbps
- 50..100Mbps
- 50..100Mbps

### LibreSpeed

- 54.1Mbps
- 54.3Mbps
- 54.4Mbps

That gives an average of 54.3Mbps and a standard deviation of 0.15Mbps for the downloadspeed.

### Measurement Lab

- 50.82Mbps
- 51.13Mbps
- 51.17Mbps

That gives an average of 51.0Mbps and a standard deviation of 0.19Mbps for the downloadspeed.

### N Perf Internet speed test

- 51.49Mbps
- 51.59bps
- 51.45bps

That gives an average of 51.5Mbps and a standard deviation of 0.07Mbps for the downloadspeed.

### Ookla Speedtest

- 51.29Mbps
- 50.76Mbps
- 50.80Mbps

That gives an average of 51.0Mbps and a standard deviation of 0.30Mbps for the downloadspeed.

### Open Speed Test

- 53.21Mbps
- 53.19Mbps
- 53.35Mbps

That gives an average of 53.3Mbps and a standard deviation of 0.09Mbps for the downloadspeed.

### RCN Speedtest

- 48Mbps
- 48Mbps
- 47Mbps

That gives an average of 48Mbps and a standard deviation of 0.6Mbps for the downloadspeed.

### Sam Knows

- 51.4Mbps
- 51.4Mbps
- 50.4Mbps

That gives an average of 51.1Mbps and a standard deviation of 0.58Mbps for the downloadspeed.

### Speed Of Me

- 55.13Mbps
- 54.97Mbps
- 55.01Mbps

That gives an average of 55.0Mbps and a standard deviation of 0.08Mbps for the downloadspeed.

### SpeedSmart

- 54.48Mbps
- 54.31Mbps
- 54.51Mbps

That gives an average of 54.4Mbps and a standard deviation of 0.11Mbps for the downloadspeed.

### Speedtest4.php

- 234Mbps
- 243Mbps
- 286Mbps

That gives an average of 254Mbps and a standard deviation of 27.8Mbps for the downloadspeed.

### TestMy.net

- 50.8Mbps
- 50.6Mbps
- 51.1Mbps

That gives an average of 50.8Mbps and a standard deviation of 0.25Mbps for the downloadspeed.

### TheInternetSpeedTest.com

- 54.30Mbps
- 54.32bps
- 54.31Mbps

That gives an average of 54.3Mbps and a standard deviation of 0.01Mbps for the downloadspeed.

### Toast Internet Speed Test

- 36.7Mbps
- 45.9Mbps
- 46.4Mbps

That gives an average of 43.0Mbps and a standard deviation of 5.46Mbps for the downloadspeed.

### Wi-Fi Speed Test

- 54.39Mbps
- 54.22bps
- 54.41Mbps

That gives an average of 54.3Mbps and a standard deviation of 0.10Mbps for the downloadspeed.

### Xfinity xFi Speed Test

- 51.9Mbps
- 51.6Mbps
- 52.1Mbps

That gives an average of 51.9Mbps and a standard deviation of 0.25Mbps for the downloadspeed.

## False accuracy

Almost every speed test has a false accuracy. The significant figures do not correspond to the standard deviation.

The only exception is "Internet Speed at a Glance" which only gives a range for the download speed.