Reaction Time Test
Click as fast as you can when the screen turns green. Measures your reaction time in milliseconds. Average 5 attempts for your true score.
Click the box (or press Space / Enter) to start. React the moment it turns green.
How to use
- 1Start
Click the big box to begin. It will turn red — wait for it.
- 2Wait
The screen turns red. After a random delay (1–5 seconds) it turns green.
- 3React!
Click (or press Space) as fast as you can the moment it turns green.
- 4Average
Complete 5 attempts to get your average reaction time. Your best is saved locally.
Frequently asked
Average human reaction time is 200–300 ms. Under 200 ms is excellent. Elite gamers average around 150–180 ms.
Reaction time depends on alertness, caffeine, sleep, and whether you anticipated the click. 5-attempt averages are more reliable than single attempts.
Clicking before the screen turns green counts as a false start and that attempt is discarded.
Yes — press Space or Enter instead of clicking when the screen turns green.
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