Reaction Time Test
How fast is your brain? The average human reaction time is 250ms. Formula 1 drivers react in under 200ms. Test yours for free and find out where you stand globally.
5 Free Reaction Time Tests
Stop
Stop a timer at exactly 5 seconds. Tests your internal clock precision.
Play free →
F1 Reaction
React the moment the Formula 1 lights go out. Pure reaction time.
Play free →
Pendulum
Stop a swinging pendulum at dead center. Anticipatory timing.
Play free →
Ace
Tap when a moving ball crosses the target. Spatial reaction timing.
Play free →
Letter Rain
Count a target letter as letters fall. Selective attention speed.
Play free →
What is reaction time?
Reaction time is the interval between a stimulus and your response. Simple reactions average 200 to 300ms. Complex tasks take longer. Both are trainable.
Sleep deprivation is the biggest degrader — one bad night makes you react like someone who is legally drunk. Regular training and exercise improve reaction time measurably within weeks.
World data
MemGenius has collected reaction time data from players across 50 countries. Egypt consistently ranks first in Stop precision with an average error of 23ms — seven times more precise than the US average of 168ms.
Test your reaction time →