Reaction Time Test
Measure your reflexes — wait for green and click as fast as you can.
The Reaction Time Test measures your reflex speed: wait for the screen to turn green after a random delay, click as fast as you can, and read your time in milliseconds. The tool tracks your last five attempts with average and best.
Typical adult visual reaction time lands between 200 and 300 ms — athletes and gamers often sit at 150–250 ms, and anything under 200 ms on a fair test is genuinely fast. Because the delay before green is random (1–3 seconds), you cannot game the result by pre-clicking — click early and the tool calls it.
Reaction time naturally varies with fatigue, caffeine and attention, so take several attempts and average them rather than chasing a single lucky number. Everything runs locally in your browser.
Runs entirely locally — reaction time is measured between the screen turning green and your click.
How to use the Reaction Time Test
- Click the grey area to start — it turns red.
- Wait — the delay before green is random.
- Click the instant the screen turns green.
- Read your reaction time in milliseconds.
- Repeat five times; compare your average and best.
Frequently asked questions
What is a good reaction time?
200–300 ms is typical for adults; under 200 ms is fast (common in young gamers and athletes); over 300 ms may mean distraction or fatigue rather than slow reflexes — retest fresh.
Why is the delay random?
A fixed delay could be anticipated, which measures prediction rather than reaction. Randomizing the 1–3 second wait forces a genuine reflex response — and catches impatient early clicks.
Can reaction time improve with practice?
Modestly — trained athletes and gamers show faster and more consistent times, but genetics and age set the ceiling. Good sleep and focus improve it more than any app.
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