What is your reaction time?

What a reaction-time score really measures

Your score is the gap between the go signal appearing and your click landing — and that gap includes more than your nervous system.

What this measures

The tool records the milliseconds between the go signal being triggered (when it switches to green) and your response arriving — a mouse click, a touch tap, or a Space/Enter key press, each labelled by its real input type. That path runs through your monitor’s refresh, the browser’s event loop, the operating system’s input stack and your device, so the number reflects your whole human-plus-hardware loop, not an isolated “neural” speed. The start is the moment the signal is set, a frame or so before it actually paints, so if anything the figure is slightly generous. Responses made before the signal are voided as “too soon,” so anticipation cannot inflate the result.

How to read your result

• A single fast attempt can be a lucky early tap. Judge yourself on your session average across several valid attempts, not one best.
• Session best and average span every valid attempt this session, including different input types — so compare like with like: same device, same way of responding.
• The same person can swing 30–50 ms between runs from attention and fatigue alone, so a few milliseconds’ difference between two attempts is noise, not improvement.
• “Too soon” attempts are excluded from your best and average — they only tell you to wait for the signal.

How your score compares

Simple visual reaction times are commonly cited in psychology references at roughly 200–250 ms for adults, but those come from controlled lab displays. A browser on a 60 Hz screen adds up to about 16 ms of display latency on its own, so treat any cross-site comparison with caution and compare mainly against your own earlier runs.

Reference: Mental chronometry (simple reaction time), Wikipedia

Practical tips

• Use a wired mouse and a high-refresh screen if you have them — both cut fixed latency that has nothing to do with you.
• Rest your finger lightly on the button and watch the whole screen rather than staring at one spot.
• Take breaks: reaction time degrades quickly with fatigue.

This is practice feedback, not a medical, cognitive or esports assessment. It measures how fast a click reached this page in this session on this hardware. See the full method →