What Is the Average Reaction Time?
The average simple reaction time to a visual signal is about 250 milliseconds for a healthy adult, measured in the lab with a dedicated response key. On a website the same person records around 270–290 ms, because the screen, mouse and browser each add a few milliseconds before the click is registered. Anything under 200 ms on a web test is genuinely quick; over 350 ms usually means a laggy device, a distracted moment or tiredness rather than slow reflexes. Below is what the research says, how the test on this site scores you, and the distribution of results recorded here.
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What does a reaction time test measure?
A simple reaction time test measures the gap between a stimulus appearing and your response — here, the screen turning green and your click. That gap covers four things: the light reaching your retina and becoming a nerve signal (roughly 20–40 ms), the signal travelling to the brain and being recognised, the decision to act, and the motor command reaching your finger and moving it. The decision part is tiny for a simple reaction (there is only one thing to do), which is why the number is so consistent across people. Add a choice — "click only if it turns green, not red" — and times jump by 50–150 ms; that is a choice reaction time and a different test.
The test on this site takes five trials and reports the mean, because a single trial is noisy: blinking, anticipating, or a browser frame arriving late can swing one attempt by 50 ms. The best of five is not used, as it rewards lucky guesses.
What counts as a good reaction time?
Laboratory studies since the 1800s put mean simple visual reaction time at 200–250 ms for young adults, with women and men within a few milliseconds of each other once hand dominance is controlled for. Auditory reaction time is slightly faster (140–160 ms) because sound is processed a little quicker than light. Online tests run 20–50 ms slower than lab equipment: a 60 Hz screen alone can delay the stimulus by up to 16 ms, and a wireless mouse adds several more. The largest web dataset, Human Benchmark, reports a median of roughly 273 ms across many millions of attempts, which matches the lab figure once that overhead is added back.
Elite athletes and esports players train to 150–180 ms, but there is a hard floor: a click faster than about 100 ms after the signal is almost certainly an anticipation, and sprint starts under 100 ms are ruled false starts for exactly that reason.
How age, sleep and devices change the number
Reaction time is fastest in the mid-twenties and then lengthens by roughly 2–6 ms per decade, so a healthy 70-year-old typically records 30–50 ms more than a 25-year-old — a real but modest change, and one that practice narrows. Far larger effects come from the day itself: a night of five hours' sleep slows responses by 20–40 ms, alcohol at the UK drink-drive limit by a similar amount, and caffeine speeds them by 10–20 ms for an hour or two. Because of this, the only fair comparison is your score, on the same device, at similar times of day. A phone touchscreen, a high-refresh gaming monitor and a work laptop will each give a different baseline for the same person.
How to improve your reaction time
- Warm up. The first two or three attempts are almost always the slowest. Take a practice run before the one you record.
- Fix the setup. Wired mouse, screen at its highest refresh rate, no background downloads. Sit close enough that the change fills your view.
- Watch the centre, not the edge. Peripheral vision detects change well but the click still needs central attention to trigger quickly.
- Don't anticipate. The green interval on this test is random precisely so that guessing costs you: a click before the change resets the trial.
- Sleep and hydration move the number more than any trick. So does regular aerobic exercise, which improves processing speed measurably in older adults.
Score bands on the reaction time test
These are the bands the reaction time test on this site uses for its result screen — The average human manages about 270 ms. Screen and mouse latency add delay for everyone, so compare scores on the same device.
| Score | Band |
|---|---|
| under 200 milliseconds | Lightning |
| 200–239 milliseconds | Quick |
| 240–299 milliseconds | Average |
| 300–379 milliseconds | Steady |
| 380–379 milliseconds | Take Your Time |
How players on this site compare
Every completed reaction time test adds an anonymous result to this site's histogram. This page shows the median and distribution once 20 results have been recorded (9 so far); until then the bands above are the guide. The live figures are always on the benchmarks page and at /api/data/norms.
Frequently asked questions
What is the average reaction time for a human?
About 250 milliseconds to a visual stimulus in laboratory conditions, and around 270–290 ms on a web-based test once screen and input latency are included. Auditory reaction time is slightly faster at roughly 150 ms.
Is 200 ms a good reaction time?
Yes. On a web test, a mean under 200 ms places you among the fastest players; most people record between 230 and 320 ms. Below about 100 ms is physically implausible and indicates an anticipated click.
Why is my reaction time slower on my phone?
Touchscreens register a tap 20–80 ms later than a wired mouse registers a click, and mobile browsers render frames less predictably. Compare scores only on the same device.
Does reaction time get worse with age?
It lengthens slowly — roughly 2–6 ms per decade after the mid-twenties — but sleep, alcohol and device latency each have a bigger effect on any given day than a decade of ageing.
Related guides
- Average Typing Speed: What Is a Good WPM?
- What Is a Good Processing Speed Score?
- What Is a Good Stroop Test Score?
- Benchmarks: how scores on this site are distributed
- All free tests
Site figures are anonymous results recorded on getmytestscore.co.uk and describe this site's players only; they are not clinical norms and should not be used for diagnosis. Research figures are cited from peer-reviewed sources and summarised in plain English.