Why this varies round to round
Reaction time isn't fixed. It drifts with attention, fatigue, and how predictable the delay feels. That is why this test averages five randomized rounds instead of reporting one click.
No installRuns in-browserFree
From green light to click: how many milliseconds?
Wait for the box to turn green, then click as fast as you can. Five rounds, your best and average time, and a running personal best saved in this browser.
Common questionsRound 1 / 5
This round's bestNot measured
AverageNot measured
All-time bestNot measured
01
What counts as a fast reaction
| Reaction time | What it means |
|---|---|
| <200ms | Elite, the range trained competitive players cluster around. |
| 200–250ms | Solid, above-average reflexes for a screen-based click test. |
| 250–300ms | The typical range for most adults on a simple visual test. |
| 300ms+ | Room to improve. Fatigue, distraction, and input lag all push this up. |
02
Why this behaves this way
What actually moves the number
Beyond raw reflexes, mouse polling rate, monitor input lag, and practice with the test's rhythm all shift the result. Treat the average as more honest than the single best click.
03