Reaction Time Test: How Fast Are Your Reflexes?

On a browser visual test most adults average 200-300 ms, with the typical middle around 270 ms. Under 240 ms is fast, under 200 ms is elite, and a steady average under 170 ms is exceptional. The tool rates your average and estimates your percentile automatically.

Simple visual reaction time averages around 250 ms in lab conditions. Online tests usually read about 20-50 ms higher because they include display and input lag. That is why about 270 ms is the typical result on browser tests like this one.

The timer starts on the animation frame that paints the signal and stops at your press-down (pointerdown or keydown). It uses the event's own high-resolution timestamp. Basic tests stop on the click, which only fires when you release the button and adds around 80-120 ms.

'Too soon' means you responded before the signal. 'Anticipated' means you responded in under 100 ms, which is faster than a human can really react, so it was a guess. Both count as false starts, and the trial is repeated so your average only includes real reactions.

Usually, yes. Sound is processed faster than sight, so most people are 20-40 ms quicker in Audio mode. If your audio score is slower, check for Bluetooth headphones, which can delay the beep by 100-200 ms.

In a simple reaction test there is one signal and one response. In a choice test you have to pick the right response, so the decision adds time. Hick's law says this delay grows as you add more options. The reflex profile shows your own choice cost in milliseconds.

It tests response inhibition. You react to a green circle but must not react to a red square. It reports your reaction time, commission errors (responding to red) and accuracy. This shows how well you balance speed against impulse control.

The Psychomotor Vigilance Task is a research test of sustained attention. You stop a counter that starts at random intervals over several minutes. A lapse is a response slower than 500 ms or no response at all. Lapses rise sharply when you are tired or short on sleep.

Yes. A 60 Hz display can add up to about 10 ms compared with 144 Hz, and wireless peripherals and monitor processing can add more. The tool shows your measured refresh rate. Use the same setup each time you test for comparable results.

Five trials give a quick estimate. Ten or twenty give a more reliable average and better consistency and trimmed-mean figures. For tracking fatigue or alertness over time, the 1-3 minute PVT is the most sensitive option.

Yes, your score can improve even though your basic nerve speed is partly fixed. Good sleep, a short warm-up, fewer distractions and regular practice all help, especially with choice and go/no-go tasks. Your progress chart shows whether your average is really dropping.

Your sessions, personal bests and settings are saved only in your browser's local storage. You can export them as CSV or clear them at any time. Nothing is uploaded, and no account is needed.

After a session, click 'Challenge link' to copy a link that contains your mode and average. When your friend opens it, the tool switches to that mode and shows the time to beat. After their session it tells them whether they beat you.

Yes. Tap the stage to react. Touch is timed on touch-down, not when you lift your finger. Phone touchscreens usually add some latency, so compare phone scores with other phone scores rather than with a desktop and wired mouse.