Tool 05 // TEST
Reaction Time Test
Free online reaction time test. Click when the screen turns green to measure your reaction speed in milliseconds, see your average and best, and find out how you compare.
Click start, wait for green, then click as fast as you can. The test records your time in milliseconds and tracks your best and rolling average so you can see if you’re warming up or fading. It works on desktop and mobile, and nothing leaves your device.
What counts as fast#
The average focused adult clicks around 250 ms. Here’s a rough scale:
- Under 180 ms — elite
- 180–220 ms — excellent
- 220–270 ms — solid / average
- 270–330 ms — a bit slow (tired or distracted)
- Over 330 ms — sluggish, or something is adding lag
The part that isn’t you#
A surprising chunk of “your” reaction time can be hardware lag. A 60 Hz monitor can add ~16 ms versus a 144 Hz+ panel, and a high-latency wireless mouse adds more. If you care about the last few milliseconds — gaming, editing, anything timing-sensitive — a high-refresh monitor and a responsive mouse remove the lag that practice can’t.
Test a few times when rested for a fair read — your best of five is more representative than any single click.
Frequently asked questions
What is a good reaction time?
For a simple visual click test, most focused adults land around 250 ms. Under ~220 ms is fast, under ~180 ms is exceptional, and 270–330 ms is normal when you're a little tired or distracted. Reaction time naturally varies by age, alertness, and how rested you are.
How is reaction time measured here?
After you start, the screen waits a random moment, then turns green. The test records the time between green appearing and your click, in milliseconds, using your browser's high-resolution timer. It runs entirely on your device — nothing is uploaded.
Why is my reaction time slower than I expected?
A few things add latency that isn't 'you': a low-refresh-rate monitor, a high-latency wireless mouse, browser load, or simple fatigue. Try again when rested, and note that display and input lag can add 20–50 ms on their own.
Can I improve my reaction time?
Somewhat. Sleep, alertness, and warming up help most. Removing hardware lag — a higher-refresh monitor and a responsive mouse — shaves off the part that isn't physiological. Beyond that, consistent practice produces small gains.