This is a simple tool to measure your reaction time. The average human reaction time is around 273 milliseconds according to collected data.
When the box turns blue, click as quickly as you can. Your results may be affected by the latency of your computer and monitor. Using a fast computer and low latency / high framerate monitor will improve your score.
Click 5 times to complete the test. If you click before the box turns blue, you'll have to restart.