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Reaction Time Test

Click as fast as you can the moment it turns green

Round 1 / 5
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Best
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Click to start
Wait while the screen is white, then click the instant it turns green. Clicking too soon voids the round.

You can also use the spacebar

How it works

  • 1.Click the very instant the screen turns green
  • 2.Results vary by device, browser, input method, and current conditions
  • 3.Every completed round is added to the ranking immediately
  • 4.Measurements from 0 to 2000ms are eligible for the ranking

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