How the Reaction Time Test Works

The reaction time test measures how long you take to click after the box turns green. After you start, the box turns red and waits a random 1.5 to 4.5 seconds, so you can’t learn the timing. The moment it turns green, the clock starts, and it stops on your click or your press of the space bar.

You get five tries, and your score is the average. One lucky click doesn’t say much, but five in a row give a fair picture of your reactions. Your best average is saved in this browser.

Clicking while the box is still red counts as too early. A click under 100 ms after green is treated as a guess and doesn’t count either, because a person can’t react to a colour change that fast. Athletics uses the same line, where a sprinter who leaves the blocks less than 0.1 seconds after the gun is given a false start.

What’s a Good Reaction Time?

Average reaction times and what they mean
Your average	Level
Under 180 ms	Elite
180-220 ms	Very fast
220-260 ms	Fast
260-320 ms	Average
Over 320 ms	Warming up

Most people average somewhere between 200 and 300 ms on a test like this. If you’re in that range, your reactions are normal. Scores improve a little with practice, but mostly they tell you how alert you are right now.

Your Setup Adds Time Too

The number you see is your reaction plus the delay of your hardware. On a fast setup that’s a few milliseconds; on a slow one it can add 30 ms or more.

Your screen. A 60 Hz monitor draws a new picture every 16.7 ms, so the green can reach you up to that much later. At 144 Hz the wait is under 7 ms.
Your mouse. Some mice, especially older wireless ones, add a little delay before the click reaches the computer.
A phone or tablet. Touch screens usually respond more slowly than a mouse, so expect higher times.
A busy computer. Close heavy apps and other tabs for your most accurate result.

So compare your scores on the same device, not with a friend who has a different setup.

How to Improve Your Reaction Time

The quickest win is where your finger sits. Rest it on the button and leave it there between tries, so the click is a small press rather than a lift and a press. Then look at the middle of the box instead of the edges, and let the colour change catch your eye.

Don’t count your first round. It’s often your slowest, so do two or three to warm up. And if your times are worse than usual, you’re probably tired: scores late at night tend to be slower. A few rounds a day will do more than an hour once a week.

Reaction Time vs Click Speed

These are two different skills. Reaction time is how fast you respond to something. Click speed is how many times you can click in a row. A PvP player needs both: fast reactions to start a fight and a high CPS to win it. Test your clicking speed on the CPS test, and read how to click faster to raise it.

Frequently Asked Questions

What is the average reaction time?

For a simple visual test like this one, most people average between 200 and 300 ms. Your own average depends on how awake you are and on your screen and mouse.

Why does it say “too early” or “that was a guess”?

“Too early” means you clicked while the box was still red. “That was a guess” means you clicked less than 100 ms after it turned green, too fast to be a real reaction. Neither counts, and you get another go.

Does the reaction time test work on a phone?

Yes, tap the box. Touch screens add some delay, so your times on a phone will usually be higher than with a mouse.

Can I use the keyboard?

Yes. Once a round has started, press the space bar instead of clicking. Some people find a key faster than a mouse button.

Can you improve your reaction time?

A little. Practice, rest and a faster screen all help. Most of the gain comes from being alert and from resting your finger on the button, rather than from training.