How to test your reaction time
- Click the box to start; it turns red.
- When it turns green, click as fast as you can.
- Repeat five times to see your average reaction time.
What is measured
The test measures simple visual reaction time: how long it takes from the moment the box turns green until your click arrives.
Typical results
The human average is about 250 ms. Younger people and gamers are often faster, and reaction time slows with tiredness, distraction and age.
Device latency
Monitors, mice and browsers add delay. A high refresh rate display and a wired mouse give results closer to your true reaction time.
Frequently asked questions
What is a normal reaction time?
For a visual cue, the average is around 250 milliseconds. Gamers and athletes often reach 150 to 200 ms.
Why are my results slower on some devices?
Your monitor's refresh rate, input lag and the mouse add a few milliseconds. A 144 Hz screen and wired mouse give the most accurate result.
Can I improve my reaction time?
Sleep, focus and practice help. Caffeine can help a little; tiredness and alcohol make it slower.
Why did it say too soon?
You clicked before the box turned green. The wait time is random so it can't be predicted.