Reaction Speed Test
When the red box turns green, click as quickly as you can.
Click anywhere to start.
About the test

This is a simple tool to measure your reaction time.
The average (median) reaction time is 273 milliseconds, according to the data collected so far.
In addition to measuring your reaction time, this test is affected by the latency of your computer and monitor. Using a fast computer and low latency / high framerate monitor will improve your score.
Scores in this test are faster than the aim trainer test, because you can react instantly without moving the cursor.
This is discussed in further detail on the the statistics page. While an average human reaction time may fall between 200-250ms, your computer could be adding 10-50ms on top. Some modern TVs add as much as 150ms!