Reaction Time Test — Measure Your Reflexes

How to use

1. Click to start. Click the zone to arm a round. It turns red while it waits a random amount of time.
2. Wait for green. Keep your hand ready but don't click. Clicking before green counts as too soon and restarts the round.
3. Click on green. The instant the zone turns green, click. Your time in milliseconds is recorded and added to your average.

Why test this

Reaction time is the gap between a stimulus appearing and your response, and in fast games it is often the margin between a win and a respawn screen. Measuring it gives you a concrete number to track instead of a vague sense of being slow. Watching that number over many sessions tells you more than any single attempt. Fatigue, caffeine, sleep, and warm-up all move it. It is also a fair way to compare input setups: because the measured time includes display latency and input lag, running the same test on different monitors or mice shows how much your gear adds on top of your reflexes. Whether you are benchmarking yourself against the 200 to 300 ms human average, warming up before a match, or checking whether a new high-refresh monitor actually shaves milliseconds off your response, a quick, repeatable test turns reaction speed into something you can measure and improve.

What the results mean

Each successful round shows the time in milliseconds between the screen turning green and your click. Lower is faster. Last is your most recent attempt, Best is your quickest of the session, and Average smooths across every valid try, which is the figure worth tracking because a single run is noisy. A typical visual reaction time lands between 200 and 300 ms; around 200 ms is quick and consistently under 180 ms is genuinely fast. Remember the number is not pure reflex: it bundles in your monitor's latency, mouse input lag, and the browser, so the same hands will read faster on a low-latency, high-refresh setup. A 'too soon' result means you clicked before green and that round is discarded. The wait is randomized between one and four seconds precisely so you can't time it. Run a dozen rounds and read the average, not the lucky single click.

FAQ

What is a good reaction time?

A typical visual reaction time is 200 to 300 ms. Around 200 ms is fast, under 180 ms is excellent. Gamers often sit a little below average with practice.

Why is my reaction time higher than I expected?

The number includes your hardware: display latency, input lag, and the browser all add a few milliseconds on top of your actual reflexes.

Does the wait time before green vary?

Yes, on purpose. The delay is randomized between one and four seconds so you can't anticipate the green and have to react genuinely.

Why does it say 'too soon'?

You clicked while the zone was still red, before it turned green. That round doesn't count, so wait for green and try again.

Is this reaction time test free?

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

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