Mini Games
Reaction Time Test
Tap the moment the screen turns green.
Game Rules
- Wait while the box is red — it turns green at a random moment 1.2–3.5 s later.
- Click or tap the instant it turns green. Your score is the average of five valid rounds.
- Clicking on red is a false start: the round restarts and 1 second (1000 ms) is added to your average.
My Best Reaction Time
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Try to beat your personal best!
Ranking
| Rank | Nickname | Score |
|---|---|---|
| Rank | Nickname | Score |
|---|---|---|
- |  You | - |
Your record is only saved in this browser.
Records are not shared across different browsers or devices.
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Reaction Time Test measures your simple visual reaction time: the box starts red, and after a random pause of 1.2 to 3.5 seconds it turns green. Click or tap the instant you see green, and the time between the color change and your input is recorded in milliseconds.
You play five valid rounds, and your score is their average. A false start — clicking while the box is still red — restarts that round and adds 1 second (1000 ms) to your average, so one impatient click costs far more than one slow round. The results screen shows your average, your fastest single round and your false-start count; the average goes to the ranking, and a challenge link lets a friend play under exactly the same rules.
Simple visual reaction time in adults is usually put at roughly 200–300 ms, but a browser test also counts your hardware. Screen refresh rate, mouse or touchscreen latency and the browser itself can add a few tens of milliseconds, so phones and 60 Hz displays tend to read slower than a wired mouse on a high-refresh monitor. Compare scores on the same device, and expect sleep, fatigue and warm-up to move your numbers from day to day.
Frequently Asked Questions
Q. How does the reaction time test work?
A. You click or tap the moment the red box turns green. The switch comes after a random 1.2–3.5 second wait, and five valid rounds are timed in milliseconds.
Q. How is my score calculated?
A. Your score is the average of the five rounds plus 1,000 ms for every false start. Your fastest single round is shown too, but the ranking uses the average.
Q. What happens if I click before it turns green?
A. It counts as a false start: the round is replayed and 1 second is added to your average. React to the color change instead of guessing the timing.
Q. What is a normal reaction time?
A. Simple visual reaction time is usually around 200–300 ms. Here an average of 220 ms or less earns the top grade and 281–350 ms is rated average; refresh rate and input lag can shift results by tens of milliseconds between devices.