The quick answer
| Average | What it means |
|---|---|
| Under 180 ms | Exceptional. Check your false-start count before believing it. |
| 180 to 220 ms | Fast. This is where practised gamers and young athletes sit. |
| 220 to 280 ms | Normal and healthy for an adult on a screen. |
| 280 to 350 ms | Slightly slow. Usually attention, tiredness or a phone rather than ability. |
| Over 350 ms | Check the device and run it again when rested before reading anything into it. |
Good depends entirely on the task
Reaction speed matters in inverse proportion to how much time the task gives you. A sprinter reacting to the gun is working with a window of a couple of hundred milliseconds and every one of them is decisive. A driver on a motorway has one and a half seconds of stopping distance to play with, so a 40 ms difference in raw reaction is trivial compared with whether they were looking at the road at all.
That is the useful frame: ask how much of your performance is reaction and how much is attention, anticipation and position. In almost every real activity, the last three dominate.
Elite athletes are not dramatically faster than everyone else at simple reaction. They are dramatically better at knowing what is about to happen.
What a good score looks like by activity
- Competitive shooters and fighting-game players. Under 220 ms simple reaction, and more importantly a tight spread — consistency wins rounds.
- Racket and bat sports. Anticipation and footwork dominate; a normal reaction time is not the limiting factor for anyone below professional level.
- Driving. Anything in the normal band is fine. Following distance and where your eyes are pointed decide outcomes.
- Sprint starts. Under 150 ms to the gun is world class; under 100 ms is ruled a false start because it is treated as physiologically impossible.
- Everyday life. If you can catch a dropped phone, your reaction time is not your problem.
Consistency beats peak speed
Two people can average 250 ms. One does it with five trials between 240 and 260. The other does it with trials at 190, 200, 210, 250 and 400. The first person is more reliable in every activity that matters, because the 400 ms trial is the one that arrives during the moment you needed the other four.
That is why the test reports your spread alongside your average. If your spread is over 100 ms, working on attention and rest will do more for you than any drill aimed at raw speed.
When a slow score is worth paying attention to
A single slow run means very little. A consistently slow result across several rested attempts on a device you know, especially if it is much slower than you remember, is worth noticing — but the right response is to look at sleep, stress, medication and alcohol, not to train reaction drills. This site measures performance on a screen; it does not diagnose anything, and any persistent change you are worried about belongs with a doctor rather than with a browser test.