How it works
The box turns red and waits a random 1.5–4.5 seconds, then turns green. The time between green appearing and your click is your reaction time. Clicking early on red doesn’t count.
What is a good reaction time?
Most people react to a visual signal in roughly 200–300 milliseconds. Gamers and athletes often average around 150–200 ms. Your result also includes your device’s delay: display refresh rate, input lag of the mouse/touchpad and browser.
Hardware that affects reaction tests
- Refresh rate: a 144 Hz screen shows the green change sooner than 60 Hz – check yours with our refresh rate test.
- Wired vs wireless mouse: wired or low-latency wireless mice are fastest.
- Touchpad: usually slower than a mouse button.
Improve your score
- Take 5+ tries and look at your average, not just your best.
- Rest your finger lightly on the button.
- Sleep and focus matter more than any trick.
Frequently asked questions
Why are my times different on different devices?
Screens, mice and browsers add different amounts of delay.