Reaction Time Test
NewTest your visual reaction time — click as soon as the box turns green, with live tracking of your last, best, and average reaction time across attempts.
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last (ms)
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best (ms)
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average (ms)
Frequently Asked Questions
What counts as a good reaction time?
Average human visual reaction time is typically around 200-250 milliseconds; times consistently under 200ms are considered fast, while times over 300-350ms are slower than average — but reaction time naturally varies by alertness, age, and practice.
What happens if I click too early?
Clicking before the box turns green is flagged as "too soon" and doesn't record a time, since that click happened before there was actually anything to react to — you'll need to click again to restart that attempt.
Why is the delay before the box turns green randomized?
A randomized delay (roughly 1.5 to 4 seconds) prevents you from anticipating exactly when the color will change and clicking on a rhythm instead of genuinely reacting to the visual change — this keeps the test measuring actual reaction time.
Does this test use any special hardware or camera?
No — it only measures the time between the box turning green and your mouse click, using the browser's built-in high-precision timer. No camera, microphone, or special input device is used.