Reaction Time Test
Wait for green, click instantly — measure your reaction time in milliseconds.
About this game
The Reaction Time Test measures pure reflex speed. The box turns red — you wait, tense — and the instant it flips to green you click. Your reaction is timed to the millisecond. Clicking too early restarts the round, just like a false start in athletics.
Average human reaction to a visual signal is around 250 ms. Gamers and athletes often break 200 ms. The test tracks your best and average across attempts so you can watch yourself improve.
How to play
- Press Start and watch the box.
- When it turns GREEN, click as fast as you can.
- Do not click on red — that is a false start and the round restarts.
- Repeat to improve your best time and average.
Frequently asked questions
What is a good reaction time?
Under 250 ms is above average, under 200 ms is excellent, and under 170 ms is elite.
Why did my click not count?
If you clicked while the box was red or orange, it counts as a false start — wait for green.
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