Reaction Time Test
Click as fast as you can when the screen turns green.👆
About Reaction Time Test
This is the purest reflex test there is: wait for red to flip to green, then click the very instant it does. Your reaction is timed in milliseconds by a high-resolution browser clock, and lower is better — around 250ms is average, under 200 is quick, and the sharpest gamers dip under 150. The catch, and the whole game really, is that the delay before green is random, so you cannot cheat by anticipating; jump early and it scolds you with "Too soon" and makes you redo the attempt. A couple of habits genuinely help: rest your finger lightly on the button so it is already loaded, and watch the entire screen rather than fixating on one point, because the colour floods your whole field of view and a soft gaze catches it faster than a hard stare. Stay relaxed, too — tension slows you down more than it braces you. Give it a few goes to warm up, since almost everyone's average improves after the first couple. Nothing to download, works by tap on mobile, fastest time saved for you.
How to play
- Click Start, then wait for the red screen to turn green.
- As soon as it turns green, click or tap (or press Space) as fast as you can.
- Your reaction time is measured in milliseconds — lower is better.
- If you click before it turns green, it counts as "Too soon" and you retry that attempt.
Strategy & tips
- Rest your finger lightly on the button so you can react the instant the colour changes.
- Watch the whole screen, not one spot — the change fills your view and you will catch it faster.
- Do not try to guess the timing; the delay is random, so anticipating just causes "Too soon" fails.
- Take a few attempts to warm up — your average usually improves after the first couple.
- Stay relaxed. Tension slows you down more than it speeds you up.
FAQ
What is a good reaction time?
Around 250ms is average for a click. Under 200ms is fast, and top gamers reach 150ms or lower.
How is it measured?
A high-resolution browser timer measures the gap between the screen turning green and your click, accurate to the millisecond.
Why does it say "Too soon"?
You clicked before the screen turned green. The delay is random on purpose, so you have to react, not guess.