Click anywhere when it turns green to measure your reflexes
After clicking start, wait for a random delay. The screen will turn red while you wait.
As soon as the screen turns green, click anywhere as fast as possible to record your reaction time.
View your reaction time in milliseconds and see how you compare to others.
Reaction time is the interval between a stimulus and the response to it. In our test, it's the time between seeing the green signal and clicking the mouse or screen.
Factors affecting reaction time include age, fatigue, alcohol consumption, and neurological conditions. Regular testing can help monitor cognitive performance and reflexes.
Monitor athletic reflexes and reaction speed for sports training.
Track cognitive performance and detect changes in neurological health.
Improve gaming performance and competitive edge in fast-paced games.
Monitor improvement over time with persistent result history.
Our test uses high-precision JavaScript timing with millisecond accuracy. While there may be slight variations due to device and browser differences, the results are reliable for personal tracking and comparison.
Reaction time can vary due to many factors including fatigue, caffeine intake, time of day, and even how rested you are. Multiple attempts help establish a more accurate average.
Yes! Regular practice, adequate sleep, exercise, and avoiding stimulants can all help improve reaction time. Many people see improvement with consistent testing.
While genetics play a role in baseline reaction time, environmental factors and training can significantly improve performance. Most people can achieve better reaction times with practice.
Yes! All your reaction time results are automatically saved in your browser's local storage, allowing you to track your progress over time and see improvement.