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Reaction time test

Wait for green, then click as fast as you can. A typical result is about 200 to 300 milliseconds.

For fun. Do not use it while tired if you are about to drive. This is not a medical test.

Private by design: this tool runs in your browser. Nothing you add is uploaded.

How to use it

  1. Click the box to start.
  2. Wait for it to turn green. Do not click while it is red.
  3. Click as fast as you can when it turns green.
  4. Try five times and look at your average.
Screenshot of the Reaction time test tool on Sureno, in use
Reaction time test in use: a real screenshot of this page.

Questions and answers

What is a fast reaction?

Under about 200 milliseconds is quick. Most people land between 200 and 300. The average of a few tries is fairer than one click.

Why does my time vary?

Attention, tiredness and your mouse or screen all add a little delay. An average of several tries is fairer.

Does age change reaction time?

Reaction times usually get a little slower with age, and practice and good sleep help.

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