Reaction Time Tester
Test how fast you can react to a sudden color change!
How the Reaction Time Test Works
This reaction tester measures how quickly you respond when the screen changes color. A random delay ensures that you cannot predict when to click. When the box turns green, your reaction time is calculated instantly in milliseconds.
The test is based on real human reflex measurement used in sports training, driving tests, and cognitive performance analysis. The average reaction time for most people is around 200 to 250 milliseconds.
All calculations are performed offline in your browser, and no data is stored or sent to any server.
Frequently Asked Questions
What is a good reaction time?
A typical reaction time is between 200 and 250 milliseconds for most people.
How does this test work?
The timer starts when the screen changes color. Your click stops the timer.
Can reaction time be improved?
Yes. Practice, proper sleep, and focus can improve your reaction time.
Is my data saved?
No. Everything stays offline in your device.