Reaction Time TestClick when it turns green and see your reflexes in ms

Reaction time turns your instincts into numbers

Reaction time is the interval between seeing a stimulus (the screen turning green) and responding to it (your click), usually measured in milliseconds (ms). A typical adult's visual reaction time sits around 200–300 ms, while esports pros and athletes are often faster. This reaction time test lets you check your reflexes anytime on your phone or computer — just wait for green and tap.

Run it several times for your true level

A single run can be swayed by luck, so the tool records every attempt and calculates your average and best, revealing your consistent, true level. If you tap before the green appears, it flags a "Too soon!" and asks you to retry, so guessing never replaces a real reaction. To learn more, see the Wikipedia article on reaction time.

Warm up, compete, and train focus

Your best score is saved in your browser so you can keep challenging yourself, and you can take turns with friends to see who's fastest. It's perfect for a pre-game warm-up, training concentration, or simply finding out how quick you are. When you're done, try our online scoreboard, dice roller and spinner wheel to make any gathering more fun.