How the test works
Click the red area to begin each round. After a random delay of 1-4 seconds, the area turns green. Click as fast as you can. If you click too early, the round restarts.
Reaction Speed Test
Measure how fast you can react to visual stimuli.
For entertainment only. This is not a clinical or diagnostic assessment.
Reaction test guide
Measure how quickly you can respond to visual cues.
A simple click-based reaction test. Wait for the green signal and click as fast as you can. Complete 5 rounds to get your average reaction time and a rating.
Rating system
Your average reaction time across 5 rounds determines your rating: S (0-150ms), A (150-200ms), B (200-250ms), C (250-300ms), D (300ms+). Your percentile shows how you compare.
Share your result
After completing the test, you can share your result as a generated poster image with your average time, rating, and percentile.
FAQ
What is a good reaction time?
The average human reaction time is around 250ms. Below 200ms is above average, under 150ms is exceptional (S-rank). Professional gamers often achieve 150-200ms.
Why is there a random delay?
The random 1-4 second delay prevents anticipation. Without it, you could predict the exact moment and get an artificially low time.
What happens if I click too early?
If you click before the area turns green, that round is invalid and restarts with a new random delay. This ensures accurate measurement.
At what age is human reaction speed at its peak?
20-29 is the peak age range for human reaction speed, with simple reaction times around 150-250ms. After age 30, reaction time declines by approximately 10-20ms per decade.
Can reaction speed be trained?
Reaction speed can improve through consistent training, but it is ultimately limited by nerve conduction velocity and has a physiological ceiling. Regular practice can help you reach your personal best, but you cannot dramatically exceed your natural baseline.
How does the scoring work?
5 reaction time measurements, excluding false starts. Your average time is compared against human reaction time distribution data to calculate your percentile ranking.
Wait for green...
Measure how fast you can react to visual stimuli.