Reaction Test

The simplest possible reaction test

Sometimes you just want a quick number. The full five-round reaction time test is more accurate, but it takes 30 seconds and requires you to stay focused the whole time. This single-click version is for when you want a snapshot right now — one click, one result, no math.

The trade-off is that single measurements are noisy. Your reaction time naturally varies by 30–50 milliseconds from attempt to attempt. A single click of 220 ms could mean you're genuinely fast, or it could mean you anticipated the green and started moving just before it appeared. The only way to know for sure is to run several attempts and look at the average.

If your number here surprises you — either very fast or very slow — run the full five-round test to confirm. The trimmed average there is a much more reliable measure of your actual reaction speed.

What's a good score on a single-click reaction test?

The adult median is about 250 ms. Anything under 200 ms is excellent — top 5% of the population. Below 180 ms is rare and usually means either exceptional reflexes or a particularly low-latency setup (wired gaming mouse, 144Hz monitor). Above 320 ms is on the slow side; common causes are fatigue, screen glare, or using a trackpad instead of a mouse.

Whatever you score, take it with a grain of salt. The single-click format is fun and fast, but it is not the format scientists or competitive gamers use to measure reaction time. For that, you want the five-round trimmed average.