Reaction Timer

Test your reflexes. Click when it turns green.

This specific tool requires JavaScript to measure millisecond timing accurately. Please enable JS or check out our Random Number Generator instead.

Wait for green...

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Your time:

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How fast is fast?

The average human visual reaction time is around 250 milliseconds (0.25 seconds). If you're consistently getting below 200ms, you might be an e-sports pro (or you're just guessing).