When the screen turns green — click as fast as you can!
The average human reaction time to a visual stimulus is 250 milliseconds (0.25 seconds). Athletes and gamers often achieve 150–220ms with training.
Professional FPS gamers typically react in 150–200ms. The fastest recorded human reaction times are around 100ms, which is near the biological limit of the nervous system.
Reaction time is affected by alertness, fatigue, caffeine, stress, and practice. Taking multiple rounds and averaging gives a more accurate baseline than a single attempt.
Yes! Regular gaming, sports, and reaction-focused exercises can improve your baseline. Sleep quality and hydration also significantly affect reaction speed.
Mouse clicks are faster than keyboard presses for most people, and touchscreen taps can add 20–30ms latency. For best results, use a mouse on a desktop browser.