Last
-
Reaction Time Test
Measure how fast you react in milliseconds. Wait for the panel to turn green, then click (or tap, or press any key) as fast as you can. Five rounds, with your average, best time and a rating at the end. False starts are caught automatically.
Wait for green — then click as fast as you can
Tip: you can also press Space or Enter while the panel is focused.
Best
-
Average
-
False Starts
0
Your result
-
average reaction
Best Round
-
All Rounds
-
Rating
-
About the reaction time test
The reaction time test measures how quickly you respond to a visual signal. After a random wait of between 1.5 and 4.5 seconds the panel turns green, and the test records the milliseconds until your click, tap or key press. Five rounds are averaged, and clicks before the signal are flagged as false starts rather than counted.
The number you see is your reaction plus your equipment: monitor refresh rate, display processing, mouse or keyboard polling and browser timing all add a little. That makes it a good way to compare your own setup over time — or to see what a faster monitor or wired mouse actually changes.
It is a fun, practical benchmark, not a medical test. Tiredness, caffeine and concentration shift results noticeably from one session to the next.
What it looks like in use
Understanding your reaction time
The test measures the gap between the panel turning green and your click, over five rounds. The average matters more than any single round, and false starts are excluded.
What this test checks
- Visual reaction time in milliseconds across five randomised rounds.
- False-start detection when you click before the green signal.
- Best round, latest round and running average as you play.
- Keyboard, mouse and touch input all supported.
How to understand your results
- Typical human visual reaction time is roughly 250-320 ms; under 200 ms is exceptional.
- Your result includes system latency: monitor refresh rate, input device and browser all add milliseconds.
- A 60 Hz screen can add up to 16 ms versus a 144 Hz screen - compare results only on the same setup.
- Fatigue, caffeine and distractions measurably change reaction speed - fun to test, not a medical measurement.
Common problems and fixes
Results feel slower than other sites
Different sites measure differently and system latency varies. Compare your own runs over time on the same hardware rather than across websites.
Clicks not registering
Test your mouse button on the mouse and touchpad test page - a worn switch can add delay or drop clicks entirely.
Big variation between rounds
Normal to a point. Very large swings suggest background processes, battery-saver mode or an unstable frame rate - check the refresh rate test.
False starts keep triggering
The wait before green is deliberately random (1.5-4.5 seconds) so it cannot be anticipated. Relax and react rather than predict.
FAQ
What is a good reaction time?
Around 250-320 ms is a normal average for a visual stimulus. Competitive gamers often average under 200 ms.
Why is my reaction time slower on a laptop screen?
Display latency is part of the measurement. Slower panels and 60 Hz refresh rates add milliseconds compared with fast gaming monitors.
Does age affect reaction time?
Yes, reaction time typically slows gradually with age, though practice, alertness and health have a large influence.
Can I use the keyboard instead of clicking?
Yes - press Space or Enter when the panel turns green. Keyboards sometimes register slightly faster than mice.
Why is the wait before green random?
So you cannot anticipate it. A fixed delay would let you time your click instead of reacting, and the result would stop measuring reaction speed.
Should I use the mouse or the keyboard?
Use whichever you want to measure, but stick to it when comparing runs. Keyboards often register a few milliseconds faster than wireless mice, and touchscreens add their own latency.
Browser-based test disclaimer
TestMyPC results are browser-based and may vary depending on your device, browser, operating system, permissions, drivers, connection, power settings and connected accessories. Use these tools as practical first checks, then confirm important faults with operating-system diagnostics, manufacturer tools or a qualified technician where needed.