REFLEXES
Reaction Time Test
Wait for the box to turn green, then click. Five rounds, one average.
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About the Reaction Time Test
Reaction time is the gap between something happening and you responding to it. In this test the signal is a colour change: the box starts red, turns green after a random wait, and the clock measures how many milliseconds pass before you click.
One try can be a lucky or sleepy outlier, so the test runs five rounds and reports the average. The random delay stops you from guessing the moment, and clicking early counts as a false start and repeats that round.
The number you get includes more than your brain. Your screen refresh rate, your mouse or trackpad, and your browser all add a few milliseconds, so compare scores from the same device when you are tracking improvement.
How the test works
- Click the box to begin. It turns red and you wait.
- When the box turns green, click (or tap, or press Space or Enter) as fast as you can.
- If you click while it is still red, that is a false start. You see a message and the round repeats.
- After five good rounds you get your average in milliseconds, your best round and your level. Submit the average to the leaderboard with a nickname if you like.
Levels
Your score maps to one of 10 levels. These ranges are guides, not official standards.
| Level | Name | Score |
|---|---|---|
| 1 | Wake-up call | 1500 or less ms |
| 2 | Slow | 400 or less ms |
| 3 | Relaxed | 330 or less ms |
| 4 | Average | 280 or less ms |
| 5 | Quick | 250 or less ms |
| 6 | Sharp | 220 or less ms |
| 7 | Fast | 200 or less ms |
| 8 | Elite | 180 or less ms |
| 9 | Pro | 165 or less ms |
| 10 | Superhuman | 150 or less ms |
Tips to improve
- Sit comfortably, rest your hand on the mouse and keep your eyes on the middle of the box.
- Do not try to predict the green. Staying relaxed beats guessing, because guesses end in false starts.
- Use the same device each time you compare scores. A high refresh rate screen and a wired mouse shave off a few milliseconds.
- Run it when you are rested. Tiredness, distraction and caffeine crashes all slow reactions.
- Ignore the first run. Most people get faster over the next two or three tries.
Frequently asked questions
What is a good reaction time?
For a visual signal, scores in the 200 to 300 ms range are very common, and many people land close to 250 ms. Under 200 ms is fast and under 170 ms is exceptional. These ranges are guides, not official standards.
Why is my score different every time?
Attention, tiredness and the random delay all change each round, which is why the test averages five rounds. Small differences between runs are normal.
Does my monitor or mouse change the result?
Yes. Your display needs a moment to show the green, and your mouse needs a moment to report the click. A 60 Hz screen can add up to about 16 ms compared with a faster one. The test cannot remove that delay, so compare results on the same setup.
What counts as a false start?
Clicking while the box is still red. The test shows a message and repeats that round. False starts are listed in your result but they do not count as a round.
Can I improve my reaction time?
A little. Practice, good sleep, a lower-latency setup and staying focused help most. Physical limits on nerve and muscle speed mean big jumps are unlikely, but trimming 10 to 30 ms is realistic for many people.
Is this the same as the reaction time in games?
It measures simple visual reaction. Games add choices, movement and prediction, so real in-game responses are usually slower than this test, but a faster simple reaction still gives you a head start.