Reaction Time Test
How fast are your reflexes? Click the moment the box turns green and see your reaction time in milliseconds. Everything runs locally in your browser.
New to this? Read the Reaction Time guide →
- Last reaction
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- Average (last 5)
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- Best
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Click the box to begin.
Average human reaction time to a visual cue is around 200–300 ms. The keyboard works too — focus the box and tap Space. Nothing is uploaded.