What is a good reaction time?

For a visual cue, around 250 ms is average. Under 200 ms is fast and over 350 ms is on the slower side, though results vary with device, age and alertness.

Why did a false start repeat my round?

Clicking before the panel turns green is a guess, not a reaction, so that round is discarded and replayed to keep the average honest.

Does my device change my score?

Yes. Touch screens, keyboards and input lag can each add or remove a few milliseconds, so compare your own results over time rather than across devices.

How many rounds should I do?

The test uses five rounds by design. Running the whole test two or three times and taking your best average is a reliable way to track progress.

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Reaction Time Test

Wait for the panel to turn green, then click or press the spacebar as fast as you can. We measure 5 rounds and report your average reaction time in milliseconds plus how you compare with other people.

Reaction Time Test Press Start, then click as soon as the panel turns green.

About the Reaction Time Test

Reaction time is how long your brain takes to respond to something it sees. The average adult reacts to a visual cue in about 250 milliseconds; trained gamers and athletes are often faster.

This test runs 5 rounds and averages them. Jumping the gun before the panel turns green counts as a false start and repeats that round, so take your time and only click once the green appears.

Test your spacebar speed · try the CPS test · test your time perception

About

The Reaction Time Test measures how quickly your brain turns a visual cue into a movement. A panel stays red for a random delay, then flips green; your job is to click or press the spacebar the instant it turns green. The test runs five rounds and averages them, discarding any false start.

You can take the test on any device. On a desktop, use the spacebar; on a phone, tap the panel. Each round shows its millisecond value as you go, so you can watch yourself speed up or slow down.

How your result is scored

Your score is the average time in milliseconds between the panel turning green and your response. Around 250 ms is typical for adults reacting to a visual cue; trained gamers and athletes often land between 200 and 250 ms, while anything under 200 ms is unusually fast.

Because the average smooths out a single lucky or unlucky round, one very fast or very slow attempt barely moves your result. Repeat the test a few times if you want a stable personal baseline.

Tips to improve

Cut distraction before you start: close extra tabs and silence notifications, since a single glance away adds tens of milliseconds.
On a desktop, rest your fingers on the spacebar rather than hovering over the mouse; the shorter travel usually shaves off a little time.
Keep sessions short. Reaction time drops when you get tired or bored, so three or four attempts in a row will feel faster than twenty.

Frequently asked questions

What is a good reaction time?: For a visual cue, around 250 ms is average. Under 200 ms is fast and over 350 ms is on the slower side, though results vary with device, age and alertness.
Why did a false start repeat my round?: Clicking before the panel turns green is a guess, not a reaction, so that round is discarded and replayed to keep the average honest.
Does my device change my score?: Yes. Touch screens, keyboards and input lag can each add or remove a few milliseconds, so compare your own results over time rather than across devices.
How many rounds should I do?: The test uses five rounds by design. Running the whole test two or three times and taking your best average is a reliable way to track progress.