⚡ Reaction Time Test

About the reaction time test

This test measures your simple visual reaction time: the delay between a change on screen and your click. The box waits a random time (between 1.5 and 4.5 seconds) so you cannot anticipate, then turns green: the timer runs until you click, tap or press the space bar.

How to use

• Click the box to start a series of 5 attempts
• Wait for green: clicking too soon cancels the attempt
• Click as fast as you can when the box turns green
• Read your average, best time and level at the end of the series

How to read your result

• Under 200 ms: excellent reflexes
• 200 to 270 ms: typical of a rested adult
• Over 300 ms: often tiredness, distraction or equipment latency

Why your result can vary

• Screen and mouse: a 60 Hz screen, a wireless mouse or a TV mode can add 10 to 50 ms
• Browser: a busy computer or many open tabs slow the display
• You: fatigue, caffeine, time of day and concentration play a big role

Tips

• Use a wired mouse and a gaming or high-refresh screen if you have one
• Keep your finger ready on the button, eyes on the box
• Do several series: the average of your best series is the most reliable figure

Privacy

• The test runs entirely in your browser
• Your record is stored only on your device (local storage)
• Nothing is sent to a server