Free Reaction Time Test
How it works
Click the box to start, wait for it to turn green, then click as fast as you can. Your reaction time is measured in milliseconds — click too early and the attempt does not count.
Reaction Time Test
Click the box the instant it turns green — your time in milliseconds, best score and average.
1 Read the rules
2 Take the test
3 Your results
⚡ Your reaction times
Recent attempts
Everyday uses
- Gamers: check your raw click speed before ranked sessions and track whether aim training is paying off.
- Alertness check: a quick self-test before a long drive or a night shift — a much slower score than usual is a sign you are tired.
- Friendly competitions: challenge friends or classmates to beat your best time on the same device.
- Progress tracking: take five attempts a day and watch your average drop over a few weeks.
Frequently asked questions
What is a good reaction time? The average for adults is around 250 milliseconds. Under 200 ms is fast, and trained gamers often land between 150 and 180 ms on a mouse.
Why did I get a “too soon” fault? You clicked while the box was still red. The green appears after a random 1–4 second wait, so guessing early always faults — wait for the color change.
Does my device change my score? Yes, a little. Touchscreens and wireless mice add a few milliseconds of input delay, so compare scores taken on the same device for a fair result.
How is the time measured? The timer starts the exact moment the box turns green and stops when your click registers, using your browser’s high-resolution clock.