Reaction Time Test - Test Your Reflexes Online

What is the Reaction Time Test?

The reaction time test (also called a reflex test or reaction speed test) is an online tool that measures how quickly you can respond to a visual stimulus. You click when the screen turns green; the test records your response time in milliseconds (ms). It’s used by gamers, drivers, athletes, and anyone curious about their reflexes—and it’s completely free on TinkerHub, with no sign-up or download.

A fast reaction time helps in esports, sports, and everyday tasks. This test gives you a simple, reliable way to see your baseline and track improvement over time.

How the Reaction Time Test Works

Our reaction time test is designed to be fair and easy to understand:

Countdown: A 3–2–1 countdown appears so you’re ready. After “Go!”, the screen turns red and you must wait.
Random delay: The screen turns green after a random delay (1–4 seconds) so you can’t guess the timing.
Click when green: As soon as you see green, click. Your reaction time is the time from green to your click, in ms.
Too early: If you click before green, the round doesn’t count and you’ll see “Too early.” Only reactions after the green are recorded.

Average Reaction Time Explained

Understanding your score helps you see how you compare:

Average human reaction time: About 250 ms for a simple visual stimulus. Most people fall in the 200–300 ms range.
Faster than average: Under 200 ms is good; under 150 ms is very fast. Some trained individuals reach 100–130 ms.
Slower than average: Over 300 ms is common if you’re tired, distracted, or on a slow device. Practice and a calm environment often improve scores.

The test shows whether you’re faster or slower than the 250 ms benchmark, plus your last attempt, last-3 average, and session best so you can track consistency.

Tips to Improve Your Reaction Time

Do a few warm-up attempts before “counting” your real runs.
Reduce distractions: quiet room, no background videos or notifications.
Use a mouse or trackpad you’re comfortable with; latency can affect results.
Get enough sleep; reaction time worsens when you’re tired.
Play regularly and try to beat your best; consistency helps more than one-off tests.
Stay relaxed but focused—don’t click too early in anticipation of the green.

Frequently Asked Questions

What is a good reaction time?

Average human reaction time to a visual stimulus is about 250 milliseconds (ms). A good reaction time is typically under 200 ms, while anything below 150 ms is considered very fast. Professional gamers and athletes often train to achieve reaction times between 100–180 ms.

How is reaction time measured?

Reaction time is measured from the moment a stimulus appears (e.g. the screen turning green) until you respond (e.g. clicking). Our test records this in milliseconds. You'll see your result for each attempt, plus your last-3 average and session best to track consistency.

Can I improve my reaction time?

Yes. Reaction time can be improved with practice, better sleep, reduced distractions, and warm-up attempts. Our free reaction time test lets you practice as often as you like and tracks your best score and daily streak so you can monitor improvement.

Is this reaction test free?

Yes. The reaction time test on TinkerHub is completely free. No sign-up, no downloads, and no limits. You can run as many tests as you want and use it on any device with a browser.

Why did it say 'Too early'?

If you click before the screen turns green, the test records a 'Too early' and the round is invalid. This keeps results fair by only counting reactions to the actual stimulus. Wait for the green, then click as fast as you can.

What's the average reaction time by age?

Reaction time tends to be fastest in young adults (roughly 18–25) and can slow slightly with age. Average reaction time is often cited as 200–250 ms for adults. Our test uses 250 ms as the average benchmark so you can compare your score.