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description=Free online reaction time test. Click when the screen turns green to measure your reaction speed in milliseconds, see your percentile and grade, and track your best score.;

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reaction time test measure your reaction speed online free reaction time test home about contact free no sign up runs in your browser reaction time test test your reaction time online when the box turns green click or press space as fast as you can measure your reaction speed in milliseconds and see how you compare rounds 1 3 5 10 click to start wait for the box to turn green then click or press space as fast as you can don t click too early why this tool measures your reaction speed in milliseconds with high precision browser timing shows your grade and percentile find out whether your reaction time is fast tracks your best score and recent history right in your browser no sign up works with mouse click the spacebar or touch on mobile about reaction time reaction time is how long it takes you to respond to something you see for a simple visual test like this one the average human reaction time is roughly 250 milliseconds and many people land between 200 and 300 ms anything under 200 ms is excellent your score depends on more than your brain monitor refresh rate mouse polling rate browser performance and display latency all add a few milliseconds to get a fair picture run several rounds and look at your average and median rather than a single best click this is a fun self test for measuring and improving your reaction speed it is not a medical diagnostic or scientific assessment and results should not be used to evaluate any health condition faq how do i test my reaction time click click to start wait for the box to turn green then click or press the spacebar as fast as you can the test measures the milliseconds between the green appearing and your click run several rounds for a reliable average what is a good reaction time for this kind of visual click test around 250 ms is average under 200 ms is excellent 200 250 ms is fast and 250 300 ms is typical most people are not far from the average what is the average human reaction time the average human reaction time to a visual stimulus is about 200 250 milliseconds reaction to sound is usually a little faster than reaction to light why does my reaction time vary between attempts reaction time naturally fluctuates with attention fatigue and anticipation hardware also matters monitor refresh rate mouse polling and browser load each add small delays that is why we show your average median and standard deviation not just one number does the test work on mobile yes on a phone or tablet tap the box instead of clicking on desktop you can click with the mouse or press the spacebar product home company about contact legal privacy terms 2026 reaction time test runs entirely in your browser free listed on indieai directory see what new ai all in ai tools ai nav site showmysites findgreatsites listyourproject webprojectlist aitop10 tools ai tool center ai toolz dir ai tool trek find us on aiblog tools okei ai tools viesearch the human curated search engine contact hello reactiontimetest win