Reaction Time Test
Test your reflexes across three modes — classic Visual, target Aim, and Go / No-Go. Five tries, then see your average in milliseconds, your percentile rank, and grab a share card.
When the box turns green, click as fast as you can.
Click / tap the pad, or press Space / Enter.
Your result
These tiers are approximate, based on typical human visual reaction times — not a live leaderboard.
What counts as a good reaction time?
For a simple visual test like this — you see one colour change and respond — most people land somewhere around 250–280 ms. Under about 220 ms is genuinely fast, and anything under roughly 180 ms is exceptional. Times below 100 ms almost always mean you clicked before you actually saw green, since that is faster than the human eye and hand can physically react.
This test measures the milliseconds between the moment your browser paints the green frame and your click. It cannot remove the tiny delay your display and operating system add before the colour physically appears — that limit applies to every in-browser reaction test — but it is consistent, so comparing your own attempts is perfectly fair.
Frequently asked questions
How does the reaction time test work?
Click "Start", then wait. The box turns orange while it's not ready — as soon as it flips to green, click (or press Space) as fast as you can. We measure the milliseconds between the screen turning green and your click. Do it five times and we show your average and your fastest attempt.
What is a good reaction time?
For a simple visual test like this, most people land somewhere around 250–280 ms. Under about 220 ms is fast, and anything under roughly 180 ms is exceptional. Times below 100 ms usually mean you clicked before you actually saw green — so try again without guessing.
Are my results saved or shared anywhere?
Your personal best is stored locally in your own browser (localStorage) and never leaves your device. There's no account, no server, and no live leaderboard — the ranking labels are approximate guides based on typical human reaction times.