Reaction Time Test

Click the box to start, then click again the instant it turns green.

Click to Start

Tap the box to begin a round

Rate Reaction Time Test: 5.0 (1 rating)

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Reaction Time Test guide

How to use the Reaction Time Test accurately

Free open source reaction time test online. Click when the color changes and measure your reflex speed in milliseconds. Useful for gaming performance. No download needed.

01 Why Test Your Reaction Time? Reflex Measurement

02 How to Use the Reaction Time Test Simple workflow

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Reaction Time Test FAQ

Common reaction time test questions

What is a reaction time test?

A reaction time test measures how quickly you respond to a visual change, in milliseconds. Click to start, wait for the screen to turn green, and click as fast as you can - the test tracks your attempts, average, best, and last times.

What is a good reaction time?

For a healthy, rested adult, 200-250 ms is the normal range for a visual stimulus. Times under 150 ms are top-tier esports level, while scores above 300 ms usually point to fatigue or distraction rather than ability.

What happens if I click before the screen turns green?

Clicking early counts as a false start - the reaction time test flags the attempt as too early instead of recording a time, so wait for the green signal before clicking.

Does my hardware affect the reaction time score?

Yes, slightly. Display latency, mouse click latency, and browser processing add a roughly constant offset to every attempt, so compare scores taken on the same setup rather than across different devices.

Is the reaction time test free?

Yes. The reaction time test is free, works in any modern browser with no download, and runs entirely on your device.

Free Reaction Time Test - Free Click Reflex Test Online