What is an average reaction time?
October 3, 2026 at 20:07
Almost everyone who takes a reflex test immediately wants to know one thing: is this good? Here is the honest answer, with the caveats that the usual “average is 250 ms” headline leaves out.
The short version
For a healthy adult reacting to a visual signal with a mouse click or key press, most results fall between 200 and 300 milliseconds. A quarter of a second is a reasonable mental anchor. Below 200 ms is fast. Below 150 ms is exceptional and worth double-checking against anticipation. Above 350 ms usually means tiredness, distraction or an unfamiliar input device rather than anything about the person.
Treat every published average as a rough band, not a threshold. Reaction time studies use different equipment, different stimuli and different populations, so the “average” shifts by tens of milliseconds between sources. The number that actually tells you something is your own score, measured repeatedly on the same setup.
Rough bands for a visual click test
| Time | Interpretation |
|---|---|
| Under 100 ms | Not a reaction — anticipation or a faulty measurement |
| 100–150 ms | Exceptional; near the physiological floor |
| 150–200 ms | Very fast; typical of practised players on good hardware |
| 200–250 ms | Fast, comfortably above average |
| 250–300 ms | Typical adult range |
| 300–400 ms | Slower than average; often fatigue, distraction or high latency hardware |
| Over 400 ms | Worth retrying when rested and focused before drawing conclusions |
Vision is the slow sense
A consistent finding across the research literature is that people react faster to sound and touch than to light. Robert J. Kosinski's widely cited review of reaction time studies at Clemson University summarises decades of experiments and reports the same ordering repeatedly: auditory reaction times come in shorter than visual ones, with tactile responses in a similar range to auditory.
The reason is processing depth. A sound reaches the auditory cortex through a comparatively short path, while visual signals require photoreceptor chemistry and several stages of cortical processing before the change is even recognised as a change. So a visual test like this one inherently produces slower numbers than a “press when you hear the beep” test — the comparison is not apples to apples.
Age
Reaction time follows a well documented arc across the lifespan. It improves steeply through childhood, peaks somewhere in the early-to-mid twenties, holds fairly flat through the thirties, and then slows gradually and increasingly with age. The decline is real but modest for most of adult life; it becomes noticeable past around sixty.
Two things are worth keeping in perspective. First, the spread within any age group is far larger than the difference between adjacent age groups — a focused, rested fifty-year-old routinely beats a distracted twenty-year-old. Second, the age effect on simple reaction time is smaller than the age effect on complex, choice-based tasks.
What moves your score on any given day
- Sleep. Sleep deprivation is one of the most reliable ways to slow reaction time, and it also increases variability — you get occasional very slow attempts, called lapses, mixed in with normal ones.
- Alcohol. Slows responses measurably, which is precisely why it is central to impaired-driving research.
- Caffeine. Generally produces a small improvement in alertness-dependent tasks, though the effect is modest and partly reflects reversing withdrawal in habitual drinkers.
- Practice. Repeated attempts at the same task improve times, mostly in the first few dozen trials, then plateau.
- Attention and distraction. Divided attention degrades reaction time substantially — background conversation and notifications genuinely cost you milliseconds.
- Warm-up. Early attempts in a session are commonly slower than attempts a minute or two in.
- Hardware. Display refresh rate, panel latency and input polling can account for tens of milliseconds. See how the measurement works.
Why a single attempt tells you almost nothing
Individual reaction times are noisy. The same person on the same equipment within the same minute will produce a spread of several tens of milliseconds, and the distribution is not symmetrical — it has a long tail towards slow responses, because attention can lapse but you cannot react faster than your nervous system allows.
So a single lucky attempt is not your reaction time, and neither is a single bad one. Take ten or more attempts and look at the middle of the range. That is why this site shows your last three results alongside your personal best — a fast best time next to three slow recent attempts tells you the best was largely luck.
What this site's ranking currently shows
These figures cover only the times fast enough to enter the global ranking, so they are a picture of the fastest tail of players rather than of typical performance:
Based on 10 ranked times. Full list on the leaderboard.
Sources and further reading
- Robert J. Kosinski, A Literature Review on Reaction Time, Clemson University — a broad survey of reaction time research covering stimulus type, age, fatigue, practice and distraction effects.
- World Athletics competition rules on false starts, which codify the 0.100 s limit as the boundary between reaction and anticipation.
