Reaction Time Test

How fast are your reflexes? Wait for the pad to turn green, then click as fast as you can. This reaction time test measures your reaction speed in milliseconds over five rounds, shows your average and best, and gives you a reflex rank. Free, instant, nothing to install.

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Reaction Time Test
Click or press Space to start

How the Reaction Time Test Works

Click once to arm the test, wait through a random red delay, then click the instant it turns green. Your reaction time is the milliseconds between the green signal and your click, averaged over five rounds.

1

Click to start

The pad turns red and shows “Wait…”. Keep your finger ready but don’t click yet — a click while it’s still red is a false start and doesn’t count.

2

Click on green

After a random 1.5 to 4.5 second wait the pad turns green. Click or press Space as fast as you can — the timer runs from the green signal to your click.

3

Beat your best

After five rounds you get your average, your best round and a reflex rank. Your all-time best is saved on your device, so there’s always a target to beat. Then try the click speed test.

What Is a Good Reaction Time?

Reaction time is measured in milliseconds — lower is faster. Here is roughly where an average of five clicks puts you; the ranks in the test follow the same scale.

🐆

Under 200 ms — fast

Quicker than most people. Sub-150 ms is exceptional and close to the limit of simple human reaction.

🙂

200–250 ms — average

Where most people land on a simple colour-change test with a mouse. A solid, repeatable score.

😴

300 ms+ — warming up

Common when tired, distracted, or tapping on a phone. Warm up with a few rounds and your times usually drop.

Frequently Asked Questions

What is a good reaction time?
A good visual reaction time to a colour change is around 200 to 250 milliseconds, which is where most people land on a simple click test. Anything under 200 ms is fast, and consistent scores under 150 ms are exceptional and near the limit of human simple-reaction speed. Times above 300 ms are common when you are tired, distracted or reacting on a phone, because touchscreens add a little latency compared with a mouse click.
How is reaction time measured here?
The test measures the time in milliseconds between the moment the pad turns green and the moment you click or press a key. The clock uses your browser’s high-resolution timer, and it only starts on the green signal, so a random 1.5 to 4.5 second wait before each round stops you from anticipating it. Your score is the average of five valid rounds, and clicking before the green counts as a false start rather than a fast time.
Why does my reaction time vary between rounds?
Reaction time naturally varies by 20 to 50 milliseconds from click to click because attention, fatigue and the random wait length all shift slightly each round. Averaging five rounds smooths out lucky and unlucky attempts. Your display refresh rate and input device also matter: a 60 Hz screen can add up to about 16 ms of display lag, and a wireless mouse or a touchscreen usually reads a touch slower than a wired mouse.
Does the reaction time test work on mobile, and is anything saved?
Yes — the reaction time test works on any phone or tablet, where you tap the pad instead of clicking. Everything runs in your browser with no app to install and nothing is uploaded. Your best reaction time is kept in your browser’s local storage on your own device, so clearing site data resets it. Touchscreen taps usually read a little slower than a mouse, so mobile scores tend to run higher.

Add This Reaction Time Test to Your Website

Put the Reaction Time Test on your own page — free, no sign-up, no watermark. It runs entirely in your visitors' browsers. Copy the snippet and paste it into your page's HTML.

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