Guides
The research behind your scores: what counts as normal, and what moves the number.
Reaction Time
How to Improve Your Reaction Time
Practice, sleep, caffeine, and hardware each move your score. What the research says each one is worth, in milliseconds.
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How Sleep Affects Reaction Time
A sleepless night impairs you like alcohol, and two weeks of six-hour nights reads like two all-nighters. What the research shows, and what to do about it.
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How Caffeine Affects Reaction Time
One cup speeds you up as much as three. What the research shows about caffeine, reaction time, and the sleep every dose borrows.
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Average Human Reaction Time by Age
Lab data puts the early 20s at 218 ms and the early 60s at 239. Every decade's average, why the gap is small, and how to beat your bracket.
Read guideClick Speed
Average CPS: How Fast Can a Human Click?
Lab studies put one-finger tapping near 5 per second. The research behind the average CPS, why scores fade after 10 seconds, and what butterfly clicking adds.
Read guideDisclaimer: This reaction time test is for entertainment and personal tracking purposes. Results are affected by your device's hardware, browser performance, and network conditions. For scientific or medical assessments, please use calibrated laboratory equipment.