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Reaction Time Test

Click the instant the area turns green. Your reaction time is shown in milliseconds.

Click to start
Round 0 / 5
—last
—avg of 5
—personal best

Clicking while it's red counts as too soon — click again to retry. The spacebar works too.

What to expect

Simple visual reaction time is typically around 200–300 ms. Your display's refresh rate and input lag are included in the measurement, so treat the number as a relative score.

How to use

  1. Click the area to start.
  2. Wait while it's red. The moment it turns green, click as fast as you can.
  3. After 5 rounds you get an average. Your fastest time is saved on this device as your best.

FAQ

Where is my score stored?
Your personal best lives only in your browser (localStorage) and is never sent anywhere.