How to test your reaction time
- Press start and keep your finger ready over the box.
- Wait for it to turn green; do not guess.
- Click or tap the moment it changes.
- Complete five rounds to see your average and best.
What is a normal reaction time?
Many people score roughly 200 to 300 milliseconds on a test like this, which is a fifth to a third of a second. Scores vary with age, tiredness, caffeine, practice and whether you are concentrating. Your first round is often slower while you get used to it, which is why the test averages five rounds.
Reaction time measured this way is about spotting a change and pressing a button. It is a fun benchmark, not a medical test, and it does not tell you whether you are safe to drive.
Why your device affects your score
Every system adds a little delay between the box turning green and the tap being counted:
- Screen refresh rate: a 60 Hz screen updates every 16 or so milliseconds, a 144 Hz gaming monitor about every 7
- Mouse or touchscreen: wireless mice and some touchscreens add a few milliseconds
- The device itself: older phones and busy computers can be slower to respond
- Bluetooth keyboards and mice can add more delay than wired ones
So a score on a gaming PC is not directly comparable with one on an old phone. Compare scores on the same device, and if you are competing with friends, take turns on one phone or computer.
Clicking too early, and how to improve
If you click before the box turns green, the test catches it and the round does not count. The wait is random on purpose, so you cannot learn the rhythm. Anticipating is the most common way to get a bad round.
To improve, rest your finger lightly on the button, look at the middle of the box and relax. Sleep and practice help a little. Your best average is saved on this device, so you can see whether you are getting quicker over a week.
Questions people ask
What is a good reaction time?
Many people land roughly between 200 and 300 milliseconds. Anything consistent on the same device is a fair baseline to improve on.
What happens if I click too early?
The test spots it and that round does not count, so you can try again.
Why is my score slower on my phone?
Screens, touch input and the device itself all add small delays. Compare scores on the same device.
How many rounds are there?
Five. Your average across the five rounds is shown at the end.
Is my best score saved?
Yes, in this browser on this device. It is not uploaded.