Reaction Time Test

Click the moment it turns green.
Five tries, averaged.

Device and screen latency add a little; compare on the same device.

How it works

Start, wait for green, click as fast as you can. Clicking early restarts that try. After five you get your average, best and slowest times.

Measuring well

Compare results on the same device and browser. High-refresh screens and wired mice add less delay; phones are often a little slower because of touch latency.

FAQ

What is a normal reaction time?

Many people land around 200–300 ms on tests like this.

Where is my record kept?

Only your best average, in this browser.