Reaction Time
Measure your reaction time when the panel changes.
What this tool does
The test measures the time between a visual signal and your click or tap. Run several attempts and look at the typical result, not just your fastest one: screen refresh, browser scheduling, touch latency and peripherals all affect the measurement.
How to use it
Enter the values requested by the calculator and check the result together with the notes shown below it.
Practical example
Use a realistic example from your own setup to compare scenarios. The result is a reference, not a replacement for manufacturer specifications.
How to interpret the result
Treat the result as an estimate whenever real-world factors are not available to the browser. For hardware, network or safety decisions, verify the relevant technical specifications.
Frequently asked questions
What is a good reaction time?
For visual stimuli, many people fall between 200 and 300 ms; under 200 ms is a very good result.
Do my monitor or mouse matter?
Yes: monitor latency, refresh rate and the mouse all add milliseconds. Always compare using the same hardware.