Reaction time is the gap between a stimulus and your response, and most healthy adults land somewhere between 200 and 280 milliseconds for a simple visual cue. This test measures yours over five rounds, taking the best round as your headline result. Each round starts with a red waiting screen for a random interval between one and three seconds, then flips to green; tap as fast as you can. If you tap during the red phase, that round retries. The score that lands on the leaderboard is 1000 minus your best reaction time, so lower latency means a higher rank. The test is honest about display latency: a 60 Hz monitor adds up to about 16 ms of best-case delay, while gaming monitors at 144 Hz or higher cut that to roughly 7 ms. Run it five times before drawing conclusions about your reflexes.
How to play
Click or tap the pad to start. Wait for the red panel to turn green; tap immediately. Five rounds, with random delays so you cannot anticipate. Tap during red and that round restarts. After the fifth round you see the best, average, and the leaderboard-ready score, computed as 1000 minus the best reaction time in milliseconds. Sharing the result is a built-in button below the modal.
Frequently asked questions
200 to 280 ms is typical for adults on a click-to-color test. Top esports players can hit 150 ms repeatedly. Anything under 200 is fast. If you are sleep-deprived, that range can drift up by 20 to 40 ms before you even notice.