Wait for the red box to turn green, then click (or tap, or press the space bar) as fast as you can. Five rounds, then you get your average.
The box turns red and waits a random 1.5 to 4.5 seconds, so you cannot predict the moment it changes. When it turns green the clock starts; your click stops it. Clicking too early counts as a false start and the round is repeated. After five valid rounds you see the average of all five, which is a far more reliable number than any single click.
| Average | Rating |
|---|---|
| Under 200 ms | Excellent, gamer or athlete level |
| 200 - 250 ms | Very good |
| 250 - 300 ms | Typical |
| 300 - 400 ms | Slower than usual, try again rested |
| Over 400 ms | Probably distracted or high input lag |
These bands are rough guides, not medical benchmarks. Your best score is saved in this browser only.
For a visual stimulus most people land between about 200 and 300 milliseconds. Under 200 ms is very quick, and anything above 350 ms usually means you were distracted or the device added delay.
Attention, tiredness, caffeine, screen refresh rate and the input device all affect the number. Use the average of several rounds rather than a single click.
The timer uses the browser high resolution clock, but the screen and mouse or touch screen add some delay, typically tens of milliseconds. It is good for comparing yourself over time, not for lab measurements.
See also: Aim Trainer · Number Memory Test · Click Speed Test · Typing Speed Test · Stopwatch · Rankle daily puzzle
How to improve your reaction time · More brain games and skill tests