Reaction Time Test
Click as soon as the box turns green to measure your reaction time.
How to Test Your Reaction Time
- Click the box to start.
- Wait for it to turn from red to green.
- Click as fast as you can the moment it turns green.
- Repeat to track your best and average time.
Frequently Asked Questions
How is the reaction time measured?
The moment the box turns green is recorded using the browser's high-precision performance timer, and the moment you click is recorded the same way — the difference between the two, in milliseconds, is your reaction time.
What counts as a good reaction time?
Most people fall somewhere between 200 and 300 milliseconds for a simple visual reaction test like this one. Under 200ms is unusually fast, and results naturally vary run to run based on focus and screen refresh timing.
What happens if I click before the box turns green?
It's counted as "too soon" and doesn't record a time, since clicking before the cue appears isn't a real reaction — it just resets so you can try again.
Is my score saved or sent anywhere?
No — your best and average times are only kept in memory for your current visit, and everything happens locally in your browser. Nothing is sent to a server or saved after you leave the page.