Reaction Time Test

When the box turns green, click (or tap, or press Space) as fast as you can. Five attempts.

Click to start

–Last (ms)

–Average (ms)

–Best (ms)

0/5Attempts

What is a good reaction time?

For a visual stimulus, the average adult responds in roughly 250 milliseconds. Under 200 ms is very quick; over 300 ms is slower than average. Results depend on your screen refresh rate, mouse or touch latency, tiredness and focus, so treat the number as a fun benchmark rather than a medical measurement.

Tips for a better score

Use a mouse or keyboard on a screen with a high refresh rate.
Keep your finger resting on the button.
Do not click early — it counts as a false start and the attempt restarts.

FAQ

Why is my score different from other sites?

Each device adds its own delay between your click and the browser registering it. Compare scores on the same device over time.

Is my score stored?

No. Nothing is uploaded; the result lives only in this page.