Reaction Time Test
Guide & FAQYour history
No runs saved yet.
Times are measured with performance.now() from the moment the page asks the browser to show the signal until your click or key press. Your screen refresh rate, display lag, mouse polling rate and audio output all add a few to a few dozen milliseconds that no web page can see, so compare results on the same setup. Percentiles use a rough bell-curve model, not a lab study.
Guide: Reaction Time Test
This reaction time test shows how quickly you respond to a signal, in milliseconds. Pick Visual mode to react to the pad turning green, or Audio mode to react to a short beep. Each run has five tries, and the average is your result.
How to get a reliable score
- Use the same mouse, monitor and browser each time so runs are comparable.
- Keep your finger resting on the button or on the Space key, ready to press.
- Do a couple of warm-up runs; the first try of the day is usually the slowest.
- Turn on your monitor's highest refresh rate if it has one.
What affects the number
Your own nervous system accounts for most of a typical 250 ms result, but equipment adds some too. A 60 Hz screen can show the signal up to 16 ms late, a wireless mouse can add a few milliseconds, and Bluetooth headphones add noticeable audio lag. Because of this, a web test is best used to track your own progress rather than to compare with people on different hardware.
Percentile estimate
After five tries the tool compares your average with a simple bell-curve model of typical players (visual mean about 270 ms, audio about 225 ms). It is a friendly guide, not a scientific norm.
Tips for gamers
Reaction speed matters in shooters and fighting games, but game sense and aim matter just as much. Try the aim trainer and click speed test next to see the full picture of your mechanical skill.
FAQ
What is a good reaction time?
Most people land between 200 and 300 ms on a visual test. Under 200 ms is very fast, and under 150 ms usually means you are anticipating the signal rather than reacting to it.
Why is my audio result faster than the visual one?
Your brain processes sound slightly faster than light, so audio reaction times are often 20 to 40 ms lower than visual ones on the same device.
How accurate is this test?
Timing uses performance.now(), but your monitor refresh rate, display latency, mouse polling rate and audio output add delay that a web page cannot measure. Use it to compare yourself on the same setup.
What does Too soon mean?
You clicked before the signal appeared. That try is not counted, and you simply start the try again.
Is my history uploaded anywhere?
No. Your recent averages are stored only in your own browser with localStorage, and you can clear them at any time.
Open-source licences
- Original code: Original work by 404gang.org, no third-party code