Simple Reaction Time Test
Measure your visual reaction time across 5 attempts. A single stimulus appears — click it as fast as you can. Track your progress over time with detailed charts and statistics.
About Simple Reaction Time
Simple reaction time (SRT) measures how quickly you respond to a single stimulus. A green target appears at a random position after a variable delay, and you click it as fast as possible. This is the most basic form of reaction testing — one stimulus, one response.
SRT primarily measures sensory processing and motor response speed without decision-making. It is widely used in cognitive psychology research, sports science, and clinical neurology as a baseline measure of processing speed.
Ready to test your reflexes?
Click the target as fast as you can when it appears. You will have 5 attempts.
Simple Reaction Time Norms by Age
Average simple reaction times vary by age. These benchmarks are based on published research in cognitive psychology.
| Age Group | Average SRT | Rating |
|---|---|---|
| 15–24 | 220 ms | Fastest age group |
| 25–34 | 240 ms | Near-peak performance |
| 35–44 | 255 ms | Slight decline begins |
| 45–54 | 270 ms | Moderate decline |
| 55–64 | 290 ms | Noticeable slowing |
| 65+ | 320 ms | Significant decline |
How to Test Your Reaction Speed
- Click Start — press the start button to begin a new session of 5 attempts.
- Wait for the target — a green circle appears at a random position after a short delay. Don't click too early!
- Click the target — react as fast as you can. Your reaction time is measured in milliseconds.
- Complete 5 attempts — the fastest and slowest times are dropped, and the trimmed average of the remaining 3 is your session score.
- Track your progress — your results are saved locally and displayed in a chart so you can see improvement over time.
Who Uses Reaction Speed Tests
Gamers
Competitive gamers use reaction tests to benchmark and train their reflexes for faster in-game responses.
Athletes
Athletes measure visual reaction time to track neurological fitness and response speed as part of training.
Students and researchers
Science students study human reaction time for projects on perception, aging, or the effects of caffeine and sleep.
Curiosity seekers
Anyone curious about how fast they react. Compare your score with the average of 250ms and challenge your friends.
Frequently Asked Questions
How is the average reaction time calculated?
Each session consists of 5 attempts. The fastest and slowest times are dropped, and the average of the remaining 3 values is calculated. This trimmed mean approach reduces the impact of outliers.
Is Reaction Speed Test free?
Yes, it's completely free with no limits on usage. Your results are stored locally in your browser.
Is my data sent to a server?
No. All processing happens locally in your browser. Your reaction times are saved in localStorage and never leave your device.
What is a good reaction time?
The average human visual reaction time is around 250 ms. Times under 200 ms are considered excellent, while 200-250 ms is great. Regular practice can help improve your reaction speed.
Why does the target appear at random positions?
Random target placement prevents mechanical clicking. It ensures you are actually reacting to the visual stimulus rather than clicking a memorized position.