PC Test Suite

Reaction Time Test

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.

Test zone

Click anywhere in this box to start round 1 of 5

Wait for green — then click as fast as you can

Round

0 / 5

Last

-

Best

-

Average

-

False Starts

0

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.

Good

The result behaves as expected, remains stable, and matches what you are trying to test.

Average

The tool works, but the result suggests a setting, environment or browser limitation may need attention.

Poor

The result is missing, unstable or clearly different from the expected behaviour. Use the fixes below as your next step.

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.

Related tools

Typing Speed Test Test your typing speed in words per minute with live accuracy, multiple durations and a clear rating. Free, browser-based, no signup. Mouse & Touchpad Test Test pointer movement, left click, right click, double click and scroll events from a mouse or laptop touchpad. Refresh Rate Test Detect your monitor's real refresh rate in Hz, watch live FPS and frame times, and check motion smoothness in your browser. Keyboard Tester Test letters, numbers, modifiers, function keys and keyboard layouts in your browser with clear troubleshooting guidance.

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.