Reaction Time Test
Click the moment the screen turns green. Measures your reaction time in milliseconds over 5 attempts and gives you an average. Clicking too early resets that attempt. Under 200ms is genuinely fast.
How to use
- Click the box to begin. It turns green after a random delay - could be 1 second, could be 4.
- The moment it turns green, click it as fast as you can. Your reaction time in milliseconds is displayed.
- Clicking too early resets that attempt. Don't guess, just react when you see green.
- Complete 5 attempts to get your average score. Sub-200ms is excellent!
Related tools:
Wait for the screen to turn green and click as fast as you can. Your reaction time is measured in milliseconds from the moment the screen changes to the moment you click. Five rounds are averaged to give you a more stable result than a single measurement, since everyone has natural variation between attempts.
Average human reaction time is 200 to 300 milliseconds for a simple visual stimulus like a color change. Trained athletes and gamers often come in around 150 to 200ms. Anything under 150ms is genuinely fast for this kind of test. Factors like tiredness, caffeine, screen brightness, and whether you are anticipating or reacting all influence your score.
Frequently Asked Questions
What is an average reaction time?
200 to 300 milliseconds is average for most adults on a simple visual reaction test. Athletes and gamers often average 150 to 200ms.
Why does my reaction time vary between rounds?
Natural biological variation, anticipation, fatigue, and small differences in attention all cause round-to-round variation. That is why the test averages multiple attempts.
Can I improve my reaction time?
Regular practice on reaction tests, sports training, and video game play have all been linked to modest improvements in reaction speed. Sleep and hydration matter too.
Does clicking early count?
Clicking before the screen turns green counts as a false start and that round is discarded. The test specifically measures reactive speed, not anticipatory clicking.