How the reaction time test works
Click the panel to start. It turns red — hold steady — then green after a random delay of two to five seconds. The moment it turns green, click as fast as you can. Your time is measured in milliseconds, and the randomised delay means you can't anticipate the change; clicking early restarts the round.
What's a good reaction time?
The average human visual reaction time is around 250 milliseconds. Most people land between 200 and 300 ms; times under 200 ms are excellent, and elite esports players and sprinters often sit in the 150–180 ms range. Because a display refreshes in steps (about 8–16 ms per frame), even a perfect click carries a little hardware overhead.
How to improve your reaction time
- Sleep matters most. Reaction time degrades measurably with fatigue — it's one of the first abilities to slow.
- Warm up. Your first attempt is rarely your fastest; times usually improve over the first five tries.
- Reduce input lag. A wired mouse and a high-refresh monitor can shave 10–20 ms off your measured score.
- Stay hydrated and take breaks. Sustained focus drains speed; short pauses restore it.
Frequently asked questions
Why is my time slower on a phone?
Touchscreens add processing delay before a tap registers — often 50–100 ms more than a mouse click. Compare scores only on the same device.
Does the test record my results?
No. Times are measured and shown on your device only — nothing is stored or sent anywhere.
Why does the average matter more than one fast click?
Any single attempt includes luck. An average over five or more attempts is a much more honest measure of your true speed.