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Reaction Time Test
Click as soon as the screen turns green. Measure your reflexes in milliseconds. Free, no sign-up.
Best
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Avg (last 5)
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About this game
A simple reaction time test. Wait for the red box to turn green, then click as fast as you can. Your reaction time is measured in milliseconds — the average human reaction time is around 200–250ms.
How to play
- 1Click the box to start a round.
- 2Wait for it to turn from red to green.
- 3Click as soon as you see green.
- 4If you click too early, it's a false start — try again.
- 5Your best time is saved and tracked over your last 5 rounds.
FAQ
What's a good reaction time?
The average human reaction time to a visual stimulus is around 200–250 milliseconds. Under 200ms is considered fast.
Why did it say "too soon"?
You clicked before the box turned green — that counts as a false start, not a valid measurement.