Reaction Time Test

How to use

1. Arm a round. Click the zone to start. It turns red and holds for a random beat while it waits to flip.
2. Hold for green. Keep your hand ready and don't click yet. A click on red counts as a false start and resets the round.
3. Click on green. The second the zone turns green, click. Your time in milliseconds is logged and folded into your running average.

Why test this

Reaction time is the delay between a stimulus hitting your eyes and your hand acting on it. In Valorant or CS2 that delay decides who lands the first shot. Putting a number on it beats guessing whether you feel slow today. One result barely matters. Watch the figure over weeks: sleep, caffeine, fatigue, and a warm-up round all move it, and a trend tells you far more than a single click. The test doubles as a gear check too. Since the measured time folds in display latency and mouse input lag, running it on one monitor and then another shows exactly how much your hardware adds on top of you. Use it to size yourself up against the 200 to 300 ms human average, to loosen up before ranked, or to prove a 240 Hz panel actually earns its price.

What the results mean

Every valid round shows the milliseconds between the green flip and your click. Lower is faster. Last is your most recent try, Best is your quickest of the session, and Average pools every counted round, which is the figure worth tracking because one click is noisy. A typical visual reaction time falls between 200 and 300 ms. Around 200 ms is quick, and holding under 180 ms is genuinely fast. The number isn't raw reflex: it carries your monitor's latency, mouse input lag, and the browser, so the same hands read faster on a low-latency, high-refresh setup. A 'too soon' result means you jumped before green, and that round is dropped. The wait is randomized between one and four seconds for the same reason, so you react instead of guessing. Run ten or more rounds and trust the average, never the single lucky hit.

FAQ

What is a good reaction time?

Most people land between 200 and 300 ms on a visual test. Around 200 ms is quick, and consistently under 180 ms is excellent. Competitive gamers tend to sit at the low end after plenty of practice.

Why is my reaction time higher than I expected?

The number is not pure reflex. Your monitor's latency, the mouse or trackpad input lag, and the browser itself each add a few milliseconds on top of how fast you actually react.

Does the wait before green change every round?

Yes, by design. The delay is randomized between one and four seconds so you can't time the green and have to react to it for real.

Why does it say 'too soon'?

You clicked while the zone was still red, before it turned green. That attempt is thrown out, so wait for green and run the round again.

Can I improve my reaction time?

A little. Warming up, good sleep, and steady practice shave off a few milliseconds, and a low-latency, high-refresh setup helps the measured number. Your raw reflex has a floor you can't train past.

Is this reaction time test free?

Yes. It runs entirely in your browser, needs no installation or account, and stores nothing.

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