Reaction Time Test
Wait for green, then click. Five tries, timed in milliseconds.
Results include mouse, display and browser delay, so they vary from device to device.
Click, tap or press Space
Nothing is stored; reloading clears the list.
How to use
- Click the box to start; it turns red.
- The moment it turns green, click, tap or press Space.
- After five tries you get your average and best.
- Early presses don't count; you just wait again.
Examples
250 · 300 · 275 · 310 · 265 ms
Tries 250 · 300 · 275 · 310 · 265 ms → average 280 ms, best 250 ms (a worked example, not a benchmark)
FAQ
How is it measured?
It times from the frame where the screen turns green to the moment your click, tap or key press arrives, using the browser's high-resolution timer.
Why do results differ between devices?
Input lag from your mouse, touchscreen or keyboard, your display's refresh rate and response time, and browser processing all add to the number. Compare results on the same device.
What if I click too early?
You'll see "Too soon", that try isn't recorded, and the wait starts again.
What is a normal reaction time?
It varies widely with the person, their condition and the device, so this page doesn't give a benchmark. Use it to compare your own results on the same device.
Are my results saved or sent?
No. They stay in this tab, disappear when you reload, and are never sent anywhere.