Reaction Time Test
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Click the pad (or press Space) to start, then click the instant it turns green.
How to play
- Click Start, then wait for the red screen to turn green.
- As soon as it turns green, click or tap (or press Space) as fast as you can.
- Your reaction time is measured in milliseconds — lower is better.
- If you click before it turns green, it counts as "Too soon" and you retry that attempt.
Strategy & tips
- Rest your finger lightly on the button so you can react the instant the colour changes.
- Watch the whole screen, not one spot — the change fills your view and you will catch it faster.
- Do not try to guess the timing; the delay is random, so anticipating just causes "Too soon" fails.
- Take a few attempts to warm up — your average usually improves after the first couple.
- Stay relaxed. Tension slows you down more than it speeds you up.
FAQ
What is a good reaction time?
Around 250ms is average for a click. Under 200ms is fast, and top gamers reach 150ms or lower.
How is it measured?
A high-resolution browser timer measures the gap between the screen turning green and your click, accurate to the millisecond.
Why does it say "Too soon"?
You clicked before the screen turned green. The delay is random on purpose, so you have to react, not guess.
Does it save my best?
Yes. Your fastest time is stored in your browser and shown between attempts on the same device.