Reaction Time Test
Wait for the screen to turn green, then click as fast as you can. This free reaction time test measures the gap between seeing the change and reacting, in milliseconds, and averages five tries for a fair number. Most people land somewhere around a fifth of a second; sleep, caffeine and practice all move it. Nothing is uploaded and there is no sign-up.
Test your reaction time and see how fast your reflexes really are. This reaction speed test measures the delay between the screen turning green and your click, then averages five goes so a single lucky tap does not skew the number. It answers the common question of what a good reaction time is and how you stack up against the average by age. Use it as a reflex test, a click-speed check, or a quick way to see how sharp you are today.
- No sign-up, ever
- 100% free
- Nothing uploaded
- Works offline after first load
- Scores stay on your device
How to use it
- 1
Click to start
Click the box and wait. The screen stays red until a random moment, so you cannot predict it.
- 2
React on green
The instant it turns green, click. Click too early on red and that try is voided so you cannot game it.
- 3
See your average
After five rounds you get your average time in milliseconds, plus your best single click.
When it comes in handy
Gaming warm-up
Loosen up your reflexes before a session and see whether you are sharp or sluggish today.
Track your day
Check how tiredness, coffee or a break changes your numbers over the course of a day.
Friendly contests
Pass the device round and see who has the quickest trigger finger.
Instant & 100% private — nothing is uploaded
Every game runs right here in your browser, and your best scores are kept on your own device. Nothing is sent to a server, so there is no sign-up and no account. Load the page once and it keeps working even if you go offline.
Frequently asked questions
- What is a good reaction time?
- For a simple click-on-green test like this, a typical result sits around 250 to 300 milliseconds. Under about 250 ms is quick, and anything near 200 ms is very fast. Your screen and mouse add a little delay, so treat the number as a fair comparison with yourself rather than an exact figure.
- Does reaction time slow down with age?
- Yes, a little. Reaction time is usually quickest in your late teens and twenties and drifts up slowly from there, often reaching the high 200s to low 300s of milliseconds in middle age. Rest, focus and regular practice matter more day to day than age does.
- Why was my try cancelled?
- If you click while the screen is still red, the round is voided. That stops you from clicking early and getting a fake-fast time, since the test only counts the gap after the colour actually changes.
- How can I get faster?
- Rest, focus and a steady hand help most. Sit ready, watch the centre of the box rather than staring, and click the moment you sense the change instead of waiting to be sure. Practice trims a little, but reaction time has natural limits.
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