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Reaction Time Test
Click (or press Space) the instant the box turns green. After five rounds you get your average reaction time in milliseconds — the average person scores around 250 ms.
Reaction Time Test
Last—
Average (5)—
Best—
Round—
How to take the test
- Click the blue box to begin. It turns red — wait.
- After a random delay of 1.5–4.5 seconds it turns green. Click as fast as you can.
- Clicking on red counts as a false start; just try that round again.
- After five rounds you see your average, median and best.
What affects reaction time
- Device lag: monitors, wireless mice and phones add 10–50 ms. A wired mouse and a high-refresh screen give the fairest result.
- Sleep, caffeine and age: tiredness slows reactions noticeably; reaction time is fastest in your twenties.
- Practice: scores improve a little with practice, mainly because you learn to stay relaxed and focused.
- Anticipation: guessing the moment leads to false starts — the random delay prevents it.
Why reaction time matters
Reaction time is the delay between seeing something and acting on it. At 100 km/h a car travels about 28 metres per second, so every extra 100 ms of reaction adds almost 3 metres of stopping distance. Drivers, athletes and gamers all benefit from quick, consistent reactions.
Typical visual reaction times
| Average | Rating |
|---|---|
| Under 200 ms | Exceptional |
| 200–249 ms | Fast |
| 250–299 ms | Average |
| 300–349 ms | Below average |
| 350 ms + | Slow — check your device or try again rested |
Frequently asked questions
What is a good reaction time?
Around 250 ms is average for a visual test like this one. Below 200 ms is excellent; professional esports players are often 150–180 ms.
Why is my phone result slower?
Touch screens add input latency (often 30–80 ms). Use a computer with a wired mouse for your fastest result.
Is the delay really random?
Yes — each round waits a random 1.5 to 4.5 seconds, so you cannot time it.