How the reaction time test works
Click or tap the test area to begin. The page waits for a random delay, turns green, and then measures how many milliseconds pass before your next click or tap. A lower number means a faster reaction in that attempt.
Free reflex test
Reaction Time Tester
Wait for the screen to turn green, then click or tap as fast as you can. Track your latest, best, average, and consistency across a short round.
- Millisecond timing
- Mouse or touch
- Best score saved
- Attempt history
- Copyable result
Reflex test
Wait for green, then click
False starts do not count. Your best score is saved in this browser only.
Reflex result
Current round
Waiting for first attempt
0 ms
- Latest reaction
- 0 ms
- Round best
- 0 ms
- Round average
- 0 ms
- Browser best
- No best yet
- Attempts
- 0 / 5
- Consistency
- Waiting
- Status
- Ready
Recent attempts
- No attempts yet.
What is a good reaction time?
Reaction time varies by device, input method, attention, sleep, and browser latency. Many casual browser tests land somewhere around the low-to-mid hundreds of milliseconds, but the fairest comparison is against your own attempts using the same device.
How to compare scores fairly
Use the same mouse, touchscreen, browser, and round length when comparing scores. Trackpad taps, phone screens, gaming mice, and high-refresh displays can all feel different. This tester is meant for quick fun and consistency practice, not laboratory measurement.
Why false starts matter
If you click before the green signal, the attempt is marked as a false start and does not count. That keeps the game honest: the goal is to react to the signal, not guess when it will appear.
Tips for better attempts
Relax your hand, keep your eyes on the test area, and avoid tensing up during the waiting phase. Short rounds are usually better than long sessions because fatigue and anticipation can skew the result.
Why device latency changes the score
A browser reaction test includes more than your nervous system. Mouse switches, touchscreen sampling, display refresh rate, browser scheduling, and the operating system can all add tiny delays. That is why a phone tap, laptop trackpad, office mouse, and gaming mouse may produce different numbers even when the same person is taking the test.
The fairest way to use this page is to compare your own rounds on the same device. If you switch devices, treat the new score as a new baseline instead of a direct improvement or decline.
Choosing 3, 5, or 10 tries
Three tries is useful for a quick warm-up. Five tries gives a better snapshot without taking long. Ten tries smooths out one lucky click or one distracted attempt, which makes the average more useful if you are comparing sessions.
If your goal is consistency, watch the average and recent attempts instead of only chasing the best score. One very fast click can happen by chance, but several similar attempts usually tell you more.
Reaction time FAQ
What does this test measure?
It measures the delay between the green signal appearing and your next click or tap. It is a simple reflex game, not a clinical or laboratory measurement.
Why do scores change between devices?
Input hardware, display timing, browser behavior, and device latency can all affect the result. Compare scores on the same device when possible.
How many attempts should I use?
Five attempts is a good quick baseline. Use ten attempts for a smoother average and three attempts when you only want a fast warm-up round.