Reaction Time Test — Measure Your Reflexes in Milliseconds
This free reaction time test measures how quickly your brain and body respond to a visual signal. Click to start, wait for the area to turn green, then click again as fast as possible. Your time is recorded in milliseconds and compared against average human reflexes.
How Reaction Time Works
Reaction time is the delay between a stimulus (the screen turning green) and your response (the click). An average person reacts in about 250–270 ms; a simple visual reaction is faster than a complex decision. Your score is affected by fatigue, focus, caffeine, and how alert you are right now.
Why Test Your Reaction Speed?
Reaction speed matters for gaming, driving, sports, and reflexes in daily life. Taking a few trials gives a reliable average and lets you track how focus or tiredness affects you. It's also just a fun, quick challenge to share with friends — see who has the fastest reflexes.
Reaction Time FAQ
What is a good reaction time? Under 250 ms is above average; under 200 ms is fast; pro gamers and athletes often reach 150–180 ms. Does the test store my data? No — everything runs locally and only your personal best is saved in your browser. Why did I get a faster score? Practice and alertness help — take a few attempts for a consistent average.