What is Reaction Time?
Reaction time measures how quickly you respond to a stimulus. In this test, we measure the milliseconds between when the button turns green and when you click it. This simple metric reveals how fast your brain can perceive, process, and act on visual information.
Average Human Reaction Times
- Average person: 250ms
- Trained athlete: 150-180ms
- Professional gamer: 140-170ms
- Absolute human limit: ~80ms (neurological minimum)
Why Reaction Speed Matters
Fast reactions are crucial in sports, gaming, driving, and many everyday situations. Sprinters rely on quick reactions to the starting gun. Gamers need fast reflexes to compete. Drivers must react quickly to avoid accidents. Training can improve your reaction time, though genetics set your baseline potential.
How the Leaderboard Works
Compete against other players for the fastest reaction time. After each valid attempt (80ms-1000ms), you can submit your score to the global leaderboard. Only your best time counts. View the full Top 50 leaderboard.
FAQ
Reaction times below 80ms are physically impossible for humans due to neural signal transmission time. If you scored under 80ms, you likely clicked before fully seeing the green, which is anticipation rather than reaction.
Get adequate sleep, stay hydrated, minimize distractions, and practice regularly. Caffeine may help temporarily. Focus on the button and avoid anticipating the change.
Many factors affect reaction time including fatigue, alertness, stress, time of day, and even your device's display lag. Multiple attempts give a more accurate picture of your typical speed.