Reaction Time Test
Measure your visual reaction time in milliseconds. Get accurate results with a 5-test average. Auto-saves your last 20 records. Perfect for gamers, athletes, and anyone curious about their reflexes.
Reaction Time Test
Results will appear when you start the test
What is a Reaction Time Test?
A reaction time test measures how quickly you respond to visual stimuli. Click the moment the red screen turns green to measure your reaction time in milliseconds (ms). The test takes the average of 5 attempts, providing more reliable and accurate results.
Whether you’re a gamer, athlete, or just curious about your reflexes, this tool helps you understand your current reaction speed and track improvement over time. All data is stored locally in your browser, with automatic management of your last 20 records.
Perfect For
- Gamers – Train your reflexes for FPS, rhythm games, fighting games, and other fast-paced games
- Esports Players – Measure and monitor reaction speed for competitive gaming
- Athletes – Improve split-second decision making for baseball, soccer, tennis, and more
- Drivers – Check your ability to respond to sudden situations and assess driving readiness
- Students & Professionals – Self-assess focus, alertness, and cognitive performance
- Age Comparison – Track how reaction time changes with age
- Fatigue Check – Compare morning vs. evening reaction times to assess your condition
Key Features
- 5-Test Average – Reduces random error and provides accurate reaction time measurement.
- Early Click Prevention – Clicking before green triggers a warning and restart.
- Random Wait Time – 2-5 second random delay prevents pattern prediction.
- Auto-Save Records – Last 20 test results are automatically saved to localStorage.
- Statistics Dashboard – View best time, worst time, and total tests at a glance.
- Rating System – Results classified as Excellent (<200ms), Fast (200-250ms), Average (250-300ms), or Slow (>300ms).
- Visual Feedback – Clear color-coded guidance (red/green/orange/blue) for each state.
How to Use
- Click Start – Click the gray area with “Start” to begin the test.
- Wait for Red – When the screen turns red, wait for it to turn green. (2-5 seconds random)
- Click on Green – The moment the screen turns green, click as fast as possible.
- Repeat 5 Times – Complete 5 attempts, with results shown after each one.
- Check Average – After all 5 attempts, see your average reaction time and rating.
- Try Again – Click “Try Again” to start a new test session.
Understanding Reaction Time
Average Reaction Time
The average visual reaction time for most people is 250-300ms. Professional gamers and athletes can achieve 150-200ms. Times under 100ms are virtually impossible and usually indicate anticipation rather than reaction.
Reaction Time by Age
- Late teens – Early 20s – Fastest period (200-250ms)
- Mid 20s – 30s – Stable performance (220-270ms)
- 40s – Begins to slow slightly (250-300ms)
- 50s and above – Gradual decline (280-350ms)
Training Effects
Reaction time can be improved by 10-20% through training. Regular practice and focus exercises are effective. Adequate sleep and moderate caffeine intake can also temporarily boost reaction speed.
Factors That Slow Reaction Time
- Sleep deprivation – Can slow reaction time by up to 50%
- Alcohol – Reaction time decreases proportionally with blood alcohol level
- Accumulated fatigue – Reduced performance after prolonged focus
- Excessive smartphone use – Attention fragmentation leads to slower reactions
Device Differences
Mouse clicks are typically 20-30ms faster than touchscreen taps. High refresh rate monitors (144Hz, 240Hz) can produce results 7-17ms faster than standard 60Hz monitors. For accurate comparison, always test in the same environment.
Frequently Asked Questions
Why does it say “Too Early”?
Clicking while the screen is still red triggers the “Too Early!” message. Don’t try to predict the timing—wait until you clearly see the screen turn green, then click. Testing based on pure reaction rather than prediction gives the most accurate results.
What is a normal reaction time?
The average for most people is 250-300ms. Times between 200-250ms are considered fast, and under 200ms is excellent. Professional gamers and athletes typically achieve 150-200ms. If you’re over 300ms, you can improve with practice.
How can I improve my reaction time?
Regular sleep (7-8 hours), focus training, and consistent practice with reaction games are most effective. Caffeine can provide a temporary boost. Playing FPS or rhythm games regularly also helps. With 10-15 minutes of daily practice, you can see noticeable improvement within 2-4 weeks.
Why are my results different on mobile vs PC?
Mouse clicks are typically 20-30ms faster than touchscreen taps. High refresh rate monitors (144Hz, 240Hz) also produce faster results than standard monitors. For accurate comparisons, always test on the same device and environment.
Where are my records saved?
All records are stored in your browser’s localStorage and are never sent to any server. The last 20 records are automatically managed. Clearing your browser data will also delete your records. You can also use the “Clear History” button to reset anytime.
I got under 100ms – is that real?
Times under 100ms exceed the limits of human visual reaction and are almost always the result of anticipation or luck. Research shows the minimum human visual reaction time is approximately 120-150ms. If your 5-test average is under 100ms, you likely clicked before seeing the green screen.
Does reaction time vary by time of day?
Yes, while individual patterns vary, most people are fastest between 10 AM and 2 PM. Reaction times tend to be slower immediately after waking up, right after meals, and late at night. Try testing at different times to find your peak performance window.