About Reaction Time Test
The Reaction Time Test measures how quickly you respond to a visual cue. Wait for the box to turn green, then click as fast as you can — your time is shown in milliseconds. Most people score between 200 and 300 ms. Can you go faster?
How to play
- Click the box to start, then wait.
- The moment it turns green, click as fast as you can.
- Your reaction time appears in milliseconds — try to beat your best.
Frequently Asked Questions
What is a good reaction time?
The average human reaction time to a visual signal is about 200–300 milliseconds. Under 200 ms is excellent.
Why did it say "Too soon"?
You clicked before the box turned green. Wait for the green colour before clicking.
Is the Reaction Time Test free?
Yes, it is completely free with no sign-up, and your best score is saved on your device.
Does it work on mobile?
Yes, you can tap instead of click on phones and tablets.