Reaction time is how quickly you respond after seeing something happen. This reaction time test measures your visual reaction time. You simply wait for the screen to turn green and click as quickly as you can. Learn more about reaction time .
The test starts with a red screen. Wait for the screen to turn green, then click immediately. Your reaction speed is measured in milliseconds (ms).
A lower reaction time means a faster response.
Your score shows how quickly you reacted during the test. There is no single “perfect” reaction time because your result can be affected by your computer, screen, mouse, browser, and other equipment.
For a better idea of your typical reaction speed, try the test several times on the same device and compare your results.