Reaction Time Test
Click the moment the screen turns green. You get five tries and your average reaction time is shown in milliseconds.
Wait for the screen to turn green, then click as fast as you can. You get five tries.
How to use it
- Click the box to start. It turns red.
- Wait. After a random delay it turns green.
- Click as fast as you can. Your time in milliseconds appears.
- After five tries you see your average in big numbers.
If you click while the box is still red, the try does not count and you start that try again.
What people use it for
- Checking your reflexes for sport or games
- Comparing with friends or family
- A science class activity
- Seeing how tiredness or caffeine affects you
- A quick break from work
Questions
What is a normal reaction time?
Many people react to a visual signal in about 200 to 300 milliseconds. Results vary with age, tiredness, the device and the screen.
Why do my results change between tries?
Reaction time varies naturally. The average of several tries is more reliable than a single try.
Does my screen or mouse change the result?
Yes. A slow screen or a wireless mouse can add a few milliseconds, so compare results on the same device.
Is it free?
Yes. No sign-up, no install and no limit.
Is anything saved or sent?
No. Everything runs in your browser. Only your own best score, where a page shows one, is kept on your device.
Last updated 2026-10-24. Free to use, no sign-up. Made by ficklestudio26.