Reaction Time Test
This online reaction time test measures how fast you respond to a visual signal, in milliseconds. When the red box turns green, click (or press Space) as fast as you can — five rounds, then your average.
What is a good reaction time?
A good score on a visual reaction time test is anything under 250 milliseconds; the average human reaction time is around 250 ms, and most people land between 200 and 300 ms. Reaction time — by definition, the delay between a stimulus appearing and your response starting — is one of the simplest ways to check how sharp your reflexes are right now.
| Average (5 rounds) | What it means |
|---|---|
| under 200 ms | Exceptional — typical of competitive FPS players |
| 200–250 ms | Fast — better than average |
| 250–300 ms | Average human reaction time range |
| over 300 ms | Below average — fatigue, distraction and device lag all add up |
Average reaction time by age
Reaction speed generally peaks in your late teens to mid-twenties and slows gradually with age — a normal effect of changes in processing speed, not something to worry about. Sleep, caffeine, screen brightness and even time of day shift your reaction speed test results, which is why an average of several attempts on the same device tells you far more than one click.
Reaction tester tips
To check reaction time fairly: use the same device each run (touchscreens and wireless mice add lag), sit ready with your finger resting on the button, and react to the color change — not a rhythm you predict. Racing fans: we also have a dedicatedF1 start-lights reaction testthat recreates a Grand Prix launch, and gamers can warm up with theaim trainer.
Frequently asked questions
What is a good reaction time?
A good visual reaction time is around 200–250 milliseconds. Most people score between 200 and 300 ms on a click-when-green test; consistently landing under 200 ms puts you in the fastest group of players.
What is the average human reaction time?
The average human reaction time to a visual stimulus is roughly 250 milliseconds. Reactions to sound are typically faster (around 170 ms) because auditory signals reach the brain more quickly than visual ones.
Is 200ms a fast reaction time?
Yes — 200 ms is faster than average for a visual reaction test. The typical range is 200–300 ms, so an average of 200 ms places you at the fast end, close to competitive-gaming territory.
Is a 100ms reaction time possible?
A genuine 100 ms visual reaction is at the edge of human physiology and essentially not achievable on a click test. In athletics, a sprint start faster than 100 ms is treated as a false start for exactly this reason — single 100 ms results on screen tests are almost always anticipation or luck, not true reaction.
How can I improve my reaction time?
You can improve reaction time modestly with regular practice, good sleep, hydration and moderate caffeine. Training helps you reach your personal floor consistently, but genetics set that floor — most people improve by 10–30 ms with practice, not by half.
What is reaction time in sports?
In sports, reaction time is the delay between a stimulus (a starting gun, a ball leaving a hand) and the start of your movement. Elite athletes combine fast raw reactions with anticipation — reading cues early — which is why practice matters as much as reflexes.
How this test works: everything runs and is timed locally in your browser, and results depend on your device and conditions. Scores are for casual benchmarking and entertainment — not a clinical, medical or diagnostic measurement.
Related tests
F1 Reaction Time Test
Five red lights out — launch like a Grand Prix driver.
msAim Trainer
Hit targets as fast as you can — average time per target.
msStroop Test
Name the ink color, not the word — measure the Stroop effect on yourself.
numbersChimp Test
Numbers hide after your first click — recall their positions in order.