How fast can you react? The average person takes about 250 milliseconds to respond to something they see — barely a quarter of a second. This test puts a number on it: arm the big red launch button, wait through a random delay, and hit it the instant it turns green.
How the test works
It's built around one rule: don't jump the gun. The button stays red while a randomized timer counts down, then flips to green. The clock starts the moment it turns, and stops when you press.
- Press too early and the round is a false start — try again.
- Wait for green, then react as fast as you can.
- Your time shows in milliseconds, with best and average kept as you go.
How to use it
- Open Reaction Time Test.
- Press the red button to arm a round.
- Watch and wait — the button is red, so hold steady.
- The instant it turns green, slam it. Read your time and go again.
The delay before green is random every round, so you can't time it from memory — you have to actually react.
What's a good score?
- Under 200 ms — lightning fast, sharper than most
- 200–250 ms — quick reflexes
- 250–350 ms — right around average
- Over 350 ms — plenty of room to improve with practice
What affects your reaction time
Sleep, caffeine, focus, and even your gear all matter. A high-refresh-rate monitor and a responsive mouse shave off milliseconds, while tiredness adds them. Because a single attempt can be lucky or sluggish, your average over several tries is the honest measure.
Try it now
It takes ten seconds to find out how quick you are. Warm up, take a few runs, and see if you can dip under 250 ms — then test your memory next with Memory Match.
