onlinegamesbrowser.comHow to play
Your reaction time is the gap between the box turning green and your tap, in milliseconds (ms). A single try can be lucky or slow, so the test averages five.
- Tap the box to begin. It turns red.
- Wait. After a random pause of a few seconds, it switches to green.
- React immediately with a tap or Space. The box shows your time.
- Do five tries. You get your Average and your Best try.
- Tap too early and it's a false start: that try is dropped, and you take it again.
Controls
- Mouse: click the box.
- Keyboard: Space, once you've clicked the game so it has focus.
- Touch screen: tap the box.
- Pause: the button stops the test between tries.
Tips
- Have your finger already touching the mouse button or spacebar when the box goes red.
- Fix your eyes on the center and react to the change rather than anticipating it. Guesses tend to be false starts.
- Only compare results from one device: every screen, mouse and touch panel adds its own small delay.
- Don't judge yourself on one try. Times naturally jump around.
FAQ
What counts as a false start?
Tapping while it's still red, or within 100 ms of the switch to green, which is faster than anyone can genuinely react. That try is redone. And if 2 seconds pass after green with no tap, the try is discarded as well.
Why do my times vary so much?
Reaction time naturally changes from try to try, and your screen and mouse or touch screen add a small delay. Averaging five tries smooths that out.
Is my best result saved?
This browser keeps your best average, unless it blocks site data or you're in a private window.
Can I take the reaction time test at school?
The reaction time test runs in an ordinary browser tab with nothing to install, so a school Chromebook can play it. Whether the page opens on a school network is the school's call, and if it is blocked there, only the IT team can change that.
