Reaction Time Tester
Measure your reaction speed in milliseconds. Wait for the green signal and click as fast as you can!
Click to Start
Test your reaction speed
How to Use Reaction Time Tester
An interactive reaction time tester that measures how fast you can click when a visual signal changes from red to green. Tracks average, best time, and full history across attempts.
Frequently Asked Questions
Average human reaction time is 200-300ms. Under 200ms is excellent.
You will get a "Too Early" warning and can try again.