How does the reaction time test work?

Press the box (or Space or Enter) to start. It turns red for a random wait of 1.5 to 5 seconds, then green. Press as fast as you can when it turns green. The time between the green box appearing and your press is your reaction time in milliseconds. You do this 5 times, and the tool then shows your average, best and slowest time.

What does "Too soon!" mean and does it count?

You pressed while the box was still red. That try does not count and is not part of your 5 tries. The tool shows how many too-soon presses you made, and you press again to start a new wait with a new random delay.

What is a good reaction time?

In a browser test most people land between about 200 and 300 ms for a visual cue. The tool tells you whether your average is faster than, inside, or slower than that range. It does not rank you against other people, because it has no population data. An average under 120 ms usually means you guessed the timing, and the tool says so.

Why is my time different on other reaction test sites?

Every result includes delays outside your body: how long your screen takes to show green, and how long your mouse, keyboard or touch screen takes to report the press. These differ between devices, so the same person can score differently on two computers. This tool times your press with the browser's pointerdown event rather than a click, which removes the extra wait for the button to be released.

Can I use the keyboard or a touch screen?

Yes. Click, tap, or press Space or Enter while the box is focused. A mouse click, a finger tap and a key press are all timed in the same way, but each device adds a different delay, so compare results from the same device only.

Yes. Every tool is free to use, with no account and no credit card. The work runs on your device rather than on our servers, which is what keeps it free to run.

Does it work on mobile?

Yes. It runs in current mobile browsers on iOS and Android, with nothing to install.

⚡

Free Reaction Time Test

Measure your reaction time in milliseconds: wait for the box to turn green, click or tap as fast as you can, and get your average and best of 5 tries.

Runs in your browserNo sign-up, no pop-upsNo login requiredFree forever5 tries, average and bestEarly-click detectionClick, tap or Space

Click the box to start. Wait for it to turn green, then click, tap or press Space as fast as you can. You get 5 tries, then your average and best time.

Click, tap or press Space to startThe box turns red while you wait. Do not press until it turns green. 5 tries.

Try 1

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Try 2

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Try 3

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Try 4

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Try 5

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How to read your result

In a browser test most people land between about 200 and 300 ms for a visual cue. This is a plain range, not a ranking against other people, and age, sleep and practice all change it.
Your result includes delays that are not you: the screen takes time to show green, and your mouse, keyboard or touch screen takes time to report the press. Together they often add tens of milliseconds, and they differ from device to device.
For comparable numbers, use the same device and input each time, and look at the average of all 5 tries rather than a single best.

⚡ Your presses are timed inside this tab only. Nothing is stored or uploaded.

How It Works

The page waits a random time, shows green, and measures how long your press takes to arrive.

1
Start the first try
Click, tap or press Space inside the box. It turns red and waits for a random 1.5 to 5 seconds.
2
React to green
When the box turns green, press as fast as you can. Pressing early shows "Too soon!" and the try does not count.
3
Repeat 5 times
After each valid press your time in milliseconds is shown. Press again to start the next try.
4
Read your result
After 5 tries you see your average, best and slowest time, compared with the range most people reach in a browser test.

Presses are timed in your browser tab only. Nothing is recorded, stored or uploaded.

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Frequently Asked Questions