Speed & reaction · Mouse · 5 rounds
Reaction Time Test
Click when the panel turns green. Five rounds, and the median is your score.
Wait for the panel to turn green, then click or press space as fast as you can.
Click or press space to start
What this measures
This test measures simple visual reaction time: the gap between a colour appearing on your screen and your finger moving. It is the most-measured number in human performance and the one most often reported wrong, because almost everything between the signal and your hand adds delay of its own.
You get five rounds and your score is the median of them, not the average. One bad round — a sneeze, a distraction, a cat — would drag an average down by tens of milliseconds and misreport what you can actually do. The median is the number you would score again if you sat down and repeated the test, which is what a benchmark is for.
Under the arena you will see the refresh rate we detected and an uncertainty figure. A 60 Hz screen can only show you the green frame at 60 discrete moments per second, so it adds up to 16.7 ms that has nothing to do with your reflexes. A 144 Hz screen adds up to 6.9 ms. We measure the frame the browser actually painted rather than the moment our code asked for the change, which is a frame or two earlier and is why some sites quietly report faster numbers than they should.
Your percentile is calculated against people using the same kind of input as you. Touchscreens are genuinely slower than mice — the panel scans on its own schedule and your finger has further to travel — so comparing a phone score against a mouse distribution is comparing two different measurements.
What is a good reaction time score
| Band | Score | Percentile |
|---|---|---|
| Top 1% | ≤ 150 ms | 99th |
| Top 5% | ≤ 175 ms | 95th |
| Top 15% | ≤ 200 ms | 85th |
| Top 30% | ≤ 225 ms | 70th |
| Median | ≤ 273 ms | 50th |
| Bottom 25% | ≤ 320 ms | 25th |
| Bottom 10% | ≤ 400 ms | 10th |
Bands anchored on Human Benchmark’s published median of 273 ms across more than 81 million recorded clicks.
Full reaction time statistics, by age and device →
Questions
What is a good reaction time?
The median adult scores around 273 ms on a mouse. Under 200 ms puts you in the top 15%, under 175 ms in the top 5%, and under 150 ms in the top 1%. Controlled measurements bottom out near 100 ms for a visual signal, so a score well below that is a lucky guess that happened to land rather than a reaction.
Why is my reaction time slower here than on other sites?
Most sites start their clock when their JavaScript changes the colour. The browser does not show that change until the next frame is painted, one to two frames later. We start the clock at the painted frame, which is honest and typically reads 8 to 30 ms slower than sites that do not.
Does my monitor affect the result?
Yes, substantially. Refresh rate adds up to half a frame of quantisation, and display processing adds more — some televisions add over 100 ms in their default picture mode. Wireless mice and keyboards add a few milliseconds on top. We show the uncertainty we can measure so you know how much of your number is you.
Is keyboard or mouse faster?
For most people the two are within a few milliseconds, but they are not identical: a key press registers on the way down while a mouse click registers on the button press, and wireless polling differs between devices. Because of that we rank keyboard scores against other keyboard scores.
What happens if I click too early?
The round is void and you repeat it. We do not score a false start as a slow round: adding a punishment number to your five rounds would corrupt your median and the shared statistics along with it.
Try next
Results are stored in your browser only. Read how we measure if you want the details of the timing, or go back to the standard reaction time.