Reaction Time Test
Measure how quickly you respond to a visual stimulus. Five attempts — we show your average, best, and worst reaction time in milliseconds.
Click to begin — 5 attempts
Device, display, browser, and input latency can affect reaction-time results. Results are for self-tracking and entertainment, not medical or diagnostic purposes.
How This Test Works
The test shows a red screen and asks you to wait. After a random delay between 1.5 and 4.5 seconds, the screen turns green and you click as fast as possible. We use performance.now()for high-resolution timing. If you click before the screen turns green, that attempt is flagged as a false start. After 5 valid attempts, you see your average, median, best, and worst times.
To interpret a specific score, see the reaction time score chart by milliseconds. For practice and setup tips, read how to improve reaction time.
Scoring
Your final score is the average of 5 valid attempts in milliseconds. Lower is better.
Factors
Display latency, input device, browser, and system load all affect results. Use the same setup for comparisons.
Tips
Keep your hand near the mouse or screen. Focus on the center of the test area. Avoid multitasking during attempts.
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Frequently Asked Questions
What is a good reaction time?
MetricRally uses four internal reference bands for this browser test: 200 ms or less is Very Fast, 201–250 ms is Fast, 251–320 ms is Average, and above 320 ms is Slow. These are product reference bands, not population percentiles. Hardware, display, browser, and input latency affect the measured result.
Why does my reaction time vary between attempts?
Variation between attempts is expected. Timing conditions, attention, device load, display latency, and input behavior can all change from one attempt to the next. Use the five-attempt average and compare repeated sessions on the same setup rather than relying on one click.
Does this test work on mobile?
Yes. Touch input has different characteristics from mouse input, so mobile and desktop results should not be treated as directly interchangeable. For useful progress tracking, compare results on the same device and input method.
Can I improve my reaction time score?
You can practice the test and track whether your results become faster and more consistent over time. Keep the device, browser, input method, and testing conditions similar so changes in your score are easier to interpret.
Learn More
Understand your result and improve your testing approach.