7 games that test and train your reaction speed. Play directly in your browser — no download, no account required. Results are shown in milliseconds so you can track improvement over time.
Reaction time is the time between a stimulus appearing and your response — measured in milliseconds (ms). The average adult reacts in 200–250ms to a visual stimulus. Trained athletes and competitive gamers often measure under 180ms.
Factors that affect reaction time: sleep deprivation adds 50–100ms, caffeine can subtract 10–20ms, age slows reactions by roughly 1ms per year after 25. Regular practice with games like Reaction Time Test can measurably improve your scores over weeks.
The Reaction Time Test is the fastest — it takes under 30 seconds and gives you a precise millisecond score. Whack-a-Mole is better for sustained reflex training. Tiles adds a rhythm element that makes it more replayable.