Reaction Time Test – test your reaction time

A reaction time test measures the time in milliseconds between a signal and your response to it. Here, the signal is a color change from red to green after a random wait of 1.5 to 4.5 seconds. Choose 3, 5 or 10 rounds, then click the area or press Space or Enter to start. As soon as it turns green, click or tap as quickly as you can. At the end, the test shows your average, rank, median, fastest and slowest times, and variation.

For a visible signal on a computer, most people’s reaction time is around 200 to 300 milliseconds. Large online datasets report a median of around 273 ms. In this test, an average from 235 to under 290 ms counts as Average. Your device adds a few milliseconds to the measured time.

Yes. In this test, an average from 200 to under 235 ms is rated “Good”, under 200 ms is “Excellent”, and under 170 ms is “Lightning fast”. From 290 to under 380 ms is “Slow”, and 380 ms or more is “Very slow”. These levels are practical guidelines, not an official scale. In gaming, consistency matters alongside your best time: low variation means you react reliably. Games also introduce latency and refresh rate effects, so your time here is a benchmark.

No. Reaction time tests for an MPU, a driving test or an employment assessment are standardized, supervised tests evaluated by the examining body. This is a self-test of your basic reaction time to a color signal, not a substitute for an official assessment. There’s no pass or fail: the rank simply puts your time in context.

If you click before the area turns green, it's a false start. The round doesn't count and repeats with a new random wait time. False starts are shown but don't count toward your average. The wait time is random so you can't predict when it will turn green. Times under 100 ms are practically impossible in response to a visual signal and are usually guesses.

The timer starts when the green image appears and stops at the timestamp of your click or keypress, both measured using your browser’s high-resolution clock. What happens in between also depends on your device: touchscreens and laptop touchpads often have more input lag than a desktop mouse. A 60 Hz screen displays a new image only about every 16.7 ms; at 144 Hz, it’s every 6.9 ms, and at 240 Hz, every 4.2 ms. So compare results only on the same device.

Get enough sleep, stay focused and don’t take the test while stressed. A high-refresh-rate screen and a mouse with a short click travel reduce device-related delay. Take several short tests instead of one long one and track your progress: the test saves your personal best for each number of rounds and shows how many milliseconds you need to reach the next rank.

Only on your own device. The test runs in your browser; nothing is uploaded, and there’s no leaderboard on our servers. Your last 30 results are stored locally in your browser and used to show your personal bests. “Clear” deletes your history. At most, the address bar shows your selected number of rounds—never your result.