Reaction Time Test
Six reflex tests - classic, F1 start lights, audio, choice and Go/No-Go - with frame-accurate timing, percentiles and friend challenges.
You vs other players
Estimated from published online reaction-time data.
Each attempt
How you compare
Personal records
Progress ·
Finish a test to start tracking your progress.
Settings
Rounds per test
Classic, F1 and Audio. Choice, Go/No-Go and Daily use fixed lengths.
Options
Reflex test · F1 lights · Audio
The most accurate reaction time test in your browser
Six ways to measure your reflexes - from the classic red-to-green test to F1 start lights and sound - timed to the exact screen frame, compared with thousands of players and saved as personal records. Then send a challenge link and see who is faster.
Six reaction tests
Classic
The standard simple reaction test: the screen turns from red to green after a random delay. Average online scores land around 250-280 ms.
F1 lights
Recreates a Formula 1 race start: lights come on one per second, then go out after a random pause. F1 drivers typically react in about 0.2 s.
Audio
Measures how fast you react to sound. Auditory reactions are usually 30-50 ms faster than visual ones, and speaker latency is compensated.
Choice
A choice reaction test: you must decide which way to respond, so it takes longer than simple reaction time. Accuracy counts too.
Go / No-Go
Tests speed and impulse control: react quickly to "go" signals but hold back on "no-go" ones. Used widely in psychology research.
Daily
A new fixed sequence every day, identical for every player - compare scores with friends on equal terms.
Average reaction time by age
Simple reaction time is fastest in the late teens and twenties and slows gradually with age. Auditory reactions are consistently quicker than visual ones.
| Age | Visual | Audio |
|---|---|---|
| 10–19 | ~250 ms | ~210 ms |
| 20–29 | ~240 ms | ~200 ms |
| 30–39 | ~255 ms | ~215 ms |
| 40–49 | ~270 ms | ~230 ms |
| 50–59 | ~290 ms | ~245 ms |
| 60+ | ~320 ms | ~270 ms |
Typical values for online tests with a mouse or touchscreen; lab measurements are usually 30-60 ms faster.
How to improve your reaction time
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Sleep well
Even one short night can slow reactions as much as mild alcohol intoxication.
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A little caffeine
A moderate dose improves alertness and reaction speed for a few hours.
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Practise regularly
Short daily sessions - like the daily challenge - build faster, more consistent responses.
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Use better hardware
A 120-240 Hz screen and a wired mouse or keyboard remove 10-30 ms of system delay.
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Stay active
Regular exercise is linked to faster processing speed at every age.
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Focus on the cue
Keep your finger ready and your eyes on the centre - but don’t guess, early clicks don’t count.
Why this test is more accurate
Most online tests time a click event, which adds delay and ignores your screen. Here every press is timestamped by the browser the moment the hardware reports it, the stimulus is timed to the exact frame it appears on, your refresh rate is measured to show the margin of error, and audio latency is compensated. Presses before the stimulus are rejected, and anything under 100 ms is flagged as a guess.
Frequently asked questions
For a simple visual test in the browser, around 250-280 ms is average. Under 220 ms is very good, and under 200 ms is excellent - comparable to F1 drivers and pro gamers.
Lab studies put simple visual reaction time at roughly 200-250 ms. Online tests usually read a bit higher (about 250-280 ms) because of mouse, screen and browser delays.
Each device adds its own delay: touchscreen sampling, screen refresh rate and input processing. A 60 Hz screen alone can add up to 16 ms. Compare scores on the same device.
Yes. Sound reaches the brain faster than visual signals are processed, so auditory reaction times are typically 30-50 ms shorter. Try the Audio mode to compare.
F1 drivers usually react to the lights going out in about 0.15-0.25 seconds. In the F1 lights mode you can see how your start compares.
It measures response inhibition - your ability to stop an action. You must react quickly to green but hold back on red, so both speed and accuracy count.
After a test, tap Challenge a friend. The link contains your score and the test mode. When your friend plays it, they see whether they beat you. No account or server storage is needed.
Your results, records and history are stored only in your browser on this device. Nothing is uploaded to our servers.