Reaction Time Test — Free Online
This reaction time test measures how quickly you respond to a visual signal — the classic way to benchmark reflex speed. Tap Start, wait for the box to turn from red to green, then tap as fast as you can. Tap before it turns green and that round doesn't count — you'll need to wait for the real signal, since anticipating instead of reacting isn't a true measurement.
The test runs 5 rounds and averages your results, since any single reaction can be thrown off by a lucky guess or a moment of distraction — an average across several attempts is a much more honest number. For context, average human visual reaction time is generally cited around 200-300 milliseconds; competitive gamers and athletes in reaction-dependent sports often train this down further.
Your best average is saved on this device, so you can come back and try to beat it. No download, no sign-up, no account — just tap and test.