About Reaction Speed Test
A free reaction time test that tells you what your number means and how much of it is your device.
Reaction time, F1 start lights, sound, choice and FPS peek
Average reaction time, how to improve it, and the ruler drop test
English, Japanese, Korean and German
No sign-up and nothing to install
What this site does
Reaction Speed Test measures how fast you react and puts the number in context. The main test is simple: wait for the lane to change, then click, tap or press a key. Alongside it are an F1 start lights test, a sound test, a choice test and an FPS-style peek test, plus guides that explain what the numbers mean.
Every result comes with the device details that affect it, like your screen’s refresh rate and whether you used a mouse or a touchscreen, so you can tell your speed from your setup’s.
How a try is scored
Under 100 ms: a guess, not counted
In the reaction, sound and F1 tests, a round is five valid tries, and a try only counts if it lands between 100 and 999 ms: anything faster is treated as a guess, and a second or more usually means you looked away. Pressing before the signal is a false start. None of these go into your average, and switching tabs cancels the try.
You see your average and median, your best and slowest try, and how consistent you were. The choice and FPS tests run ten signals per round and count correct answers or hits from 100 to 1,499 ms, because choosing and aiming take longer.
Where our numbers come from
Every reference number on this site, from averages by age to the sprint false start rule, has a numbered source beside it. Tap the number to see the source title, a link and how it was measured.
We use three kinds of source: published studies, official rules, and public statistics from other websites, which we label with the site’s name and the date we checked them. If we can’t trace a number back to its original, we leave it out.
Your scores stay on your device
Your results and history are saved in this browser’s local storage, not on a server, and you can clear them from any test page. Our analytics counts events such as a finished round, with a rough score range like 200–249 ms, never your exact times.
Read the Privacy PolicyNot a medical test
Reaction Speed Test is for curiosity and practice. It can’t diagnose ADHD, concussion or any other condition, and it can’t tell you whether you’re fit to drive. If you’re worried about your reactions, talk to a doctor.
Who runs it
Reaction Speed Test is run by Ellis Claire.
Spotted a wrong number, a broken test or a better source? Email [email protected] or use the contact page.
Contact us