Test your reaction time
Five tries of the same wait and green flash. Each one is timed in milliseconds on your own device.
- Runs on your device
- No sign-up
- Works offline after a visit
Tap the box to start the first try.
Tap or press Space as soon as the box turns green. A tap before that is too soon and does not count. Each try waits a random 1.5 to 4.5 seconds.
Screens, touchscreens, mice and Bluetooth add their own delay. Compare results on the same device, not across devices.
How to test your reaction time
- Tap the box to start. It says Wait for green.
- Tap or press Space the moment it turns green. Tapping early does not count.
- Do five tries. Your average is the big number.
Questions
What is a normal reaction time?
A literature review cited on Wikipedia gives about 190 ms for detecting a visual stimulus in college-age people. The number depends on the test, your age and your device, so compare your own tries over time.
Why is my result slower than I expected?
Each step adds delay: the screen, the input device and any Bluetooth link. Also, a result is measured from the frame in which the colour appears. Compare results on the same device, not across devices.
Why did the test say "Too soon"?
You tapped before the box turned green. That try does not count, and the wait starts again for the same try.
Does it save my results?
No. Scores are kept in this page only while it is open, and the best score of your visit goes when you leave. Nothing is uploaded or stored.
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