Reaction Time
Click when the screen changes, five times. Your average in milliseconds against your age group. Mean is 242 ms at 18 to 24 and 350 ms at 65 and over.
Press when the button turns green. 5 trials, averaged. Space or Enter works too.
Finish the five trials to see your average.
Look up a value: Is 250 ms fast? and other percentile lookups.
Related tests
About this test
Click when the box turns green, five times. The module averages the trials and compares the result to norms for your age group, built from Human Benchmark's aggregate of browser-based tests (not peer-reviewed) and Woods et al. (2015). Browser tests add 30 to 50 ms of display and input latency over lab conditions, so the norms are set for browsers.
For all ages the mean is 262 ms with SD 57. It slows steadily with age: 242 ms at 18 to 24, 258 at 25 to 34, 274 at 35 to 44, 295 at 45 to 54, 320 at 55 to 64 and 350 at 65 and over. A 200 ms average is faster than about 86% of people.
What is a good reaction time?
Under about 230 ms in a browser test is faster than roughly 70% of people (mean 262 ms, SD 57). Under 200 ms is faster than about 86%. Under 170 ms is top 5% territory and often means you were anticipating the green rather than reacting to it.
What is the average reaction time by age?
In the module's norms: 242 ms for 18 to 24, 258 for 25 to 34, 274 for 35 to 44, 295 for 45 to 54, 320 for 55 to 64, 350 for 65 and over. That is a slowdown of roughly 2 to 3 ms a year after the mid-twenties.
Is 250 ms a fast reaction time?
Slightly faster than average. 250 ms is faster than about 58% of all adults and about 44% of 18 to 24 year olds. Human Benchmark's median is around 251 ms, so 250 is the middle of the pack.
Percentiles above come from the same parameters the Reaction Time module uses. See the methodology for how they are calculated.