How to use it
Follow the on-screen instructions several times and compare repeated attempts rather than one score.
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Tests
Reaction Time Test
Click when the screen changes color and measure your reaction time in milliseconds.
Best time
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Recent average
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Last 0/5
TOOL GUIDE
When to use it
Content reviewed · 2026-07-23
Click when the screen changes color and measure your reaction time in milliseconds.
Before you rely on the result
Results can vary with the browser, operating system, display, and input device.
Data handling
Values are used only on the current screen and are not sent or stored separately.
Related tools
A few tools that fit naturally with this task.