The short answer: under 250 ms is good
On a standard visual click test, most people's median lands between 230 and 300 milliseconds. A median under 250 ms puts you ahead of roughly half of players, under 230 ms is quick, and under 200 ms is genuinely fast — the territory of regular gamers and athletes in fast-reaction sports.
Truly elite numbers are smaller than most people expect. Even professional esports players and sprinters mostly sit in the 150–190 ms range on simple visual tests. Sub-150 ms medians on honest hardware are vanishingly rare, because roughly 100 ms of every reaction is fixed biology: the time light takes to become a signal in your visual cortex and a command in your muscles.
What moves the number
Age matters: reaction time is fastest in your late teens and twenties, then slows gradually — typically by a few milliseconds per decade at first, more steeply later. Alertness matters more than people think: sleep deprivation, alcohol, and time of day can each swing results by 20–50 ms, which is why testing yourself at different times gives different answers.
Hardware matters too. A 60 Hz screen adds up to 16 ms before you can even see the signal, touchscreens and wireless mice add their own lag, and a laptop trackpad is slower to fire than a gaming mouse. That's why this site scores you on the median of five attempts and tracks mobile and desktop bests separately — the fair comparison is you against you, on the same device.
Simple vs choice reaction time
Everything above describes simple reaction time — one signal, one response. Add a decision (four colors, four buttons) and times jump by 100–200 ms, because your brain now has to identify the stimulus and select the right response before moving. That decision cost is trainable, which is why practice helps more on the choice reaction test than on the plain one.
If you want the full picture, run the reaction test first, then the choice and audio versions, and compare. The gaps between them say more about your processing than any single number does.