What is your reaction time?
When the box turns green, click as fast as you can. You will do it 5 times to get your average reaction time.
The average human reaction time to a visual stimulus is around 250 ms.
Reaction time rating scale
Where does your score land? Here is how reaction times compare.
| Reaction time (ms) | Rating |
|---|---|
| < 150 | Superhuman |
| 150–199 | Excellent |
| 200–249 | Great |
| 250–299 | Good |
| 300–349 | Average |
| 350–449 | A little slow |
| 450+ | Keep training |
How to test your reaction time
The test is simple and takes less than a minute. Follow these four steps:
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1
Start the test
Click the red box above to arm the test. The box turns red and the waiting period begins.
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2
Wait for green
After a random delay of 1 to 5 seconds the box turns green. Waiting is random on purpose so you cannot predict it.
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3
Click as fast as you can
The moment you see green, click. The timer measures the milliseconds between the colour change and your click.
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4
Read your score
Repeat five times. We drop nothing — you get your best, worst and average time, plus a rating.
Tip: if you click before the box turns green, the attempt is marked “too soon” and does not count.
What is a reaction time test used for?
Reaction time is how quickly your brain processes something it sees and turns it into a physical response. Measuring it is useful in more situations than you might think.
Gaming & esports
Competitive players use reaction drills to sharpen their aim and response speed in fast shooters and fighting games.
Sports training
Sprinters, goalkeepers, tennis and table-tennis players rely on split-second reactions. Tracking your time shows progress.
Driving & safety
Reaction time directly affects braking distance. Testing it helps you understand how alertness and fatigue change your response.
Brain & focus check
A quick daily test is a fun way to see how sleep, caffeine, exercise and stress affect your mental sharpness.
Cognitive research
Simple reaction-time tasks are a classic tool in psychology for studying attention, ageing and processing speed.
Just for fun
Challenge your friends and family — a lower score is instant bragging rights.
Tips to improve your reaction time
Reaction time is partly genetic, but you can shave off precious milliseconds. Here is what actually helps:
Get proper sleep
Even mild sleep deprivation slows your reactions dramatically. A rested brain is the single biggest factor.
Warm up first
Your first few attempts are always slower. Do a practice round before you record a serious score.
Reduce input lag
A wired mouse, a high-refresh-rate screen and a quick browser all cut the delay between your click and the timer.
Stay relaxed but focused
Tense muscles react slower. Keep your hand loose and your attention on the box, not on your score.
Anticipate, don't guess
Stay ready to move, but never click early — a “too soon” costs you far more than waiting a fraction longer.
Train consistently
Short, regular sessions and reaction games improve your baseline over weeks. Cut caffeine spikes right before testing.
Frequently asked questions
What is a good reaction time?
For a simple click test like this one, the average adult scores between 200 and 300 ms. Anything under 200 ms is fast, and elite gamers and athletes often reach 150–180 ms.
Why is my reaction time so slow?
Many factors slow you down: tiredness, distractions, a laggy mouse or screen, or simply not being warmed up. Try a few practice rounds and test again when you are fresh.
Does the device or screen affect my score?
Yes. A high refresh-rate monitor, a wired mouse and a fast connection can each save you 10–50 ms compared to a slow phone or laptop. The test measures you *and* your hardware.
How is the reaction time calculated?
When the box turns green the browser records a timestamp. When you click it records another. The difference, in milliseconds, is your reaction time. We average five attempts.
Can I really improve my reaction time?
To a degree, yes. Sleep, focus and regular practice can meaningfully lower your average, though everyone has a genetic floor they cannot beat.
Is this reaction time test free?
Completely. There is no sign-up, no download and no limit on how many times you can play. It works in any modern browser on desktop or mobile.
Do you store my results?
No. Everything is calculated in your browser and nothing is sent to or stored on our servers. Refreshing the page clears your scores.
Ready to test your reflexes?
Scroll back up and see how many milliseconds you can shave off.
Take the test