Reaction Time Test
Wait for green, then click — measure your reaction time and a 5-round average.
Reaction TimeClick to start
Average—
Last—
Best—
Round0/5
Times are measured in milliseconds with the browser's high-resolution clock. A typical human reaction is around 200–250 ms. Nothing is recorded or uploaded.
How to take the reaction test
Click to start, then wait — the screen stays red for a random delay. The moment it turns green, click as fast as you can. Your time in milliseconds is shown; clicking before green counts as too soon and restarts the round.
Getting your average
Complete five rounds and the test averages them into a single reaction time, which is more reliable than any one click. Lower is better; an occasional slow round is normal, so the average smooths it out.
Questions
What is a good reaction time?
A typical human visual reaction time is around 200–250 milliseconds. Under 200 ms is fast, and trained gamers and athletes sometimes average closer to 150–180 ms.
Why does it say I clicked too soon?
If you click while the screen is still red — before it turns green — the round resets. That's to stop you from anticipating the colour change instead of genuinely reacting to it.
Why is my reaction time different each round?
Reaction time naturally varies with attention, fatigue, and the random delay before green. That's why the test averages five rounds rather than judging you on a single click.