Reaction Time Test

You vs other players

Test	Average player	Your best	Faster than
Classic
F1 lights
Audio
Choice
Go / No-Go
Daily

Settings

Rounds per test

Classic, F1 lights and Audio. The other tests have a fixed length.

Options

Sound

Vibrate

Colour-blind palette

Your name (shown in challenges)

Personal records

Classic

F1 lights

Audio

Choice

Go / No-Go

Daily

Your best average for each test appears here.

The most accurate reaction time test in your browser

This free reaction time test measures how fast you respond to a signal, in milliseconds. Pick one of six tests: the classic colour change, the F1 start lights, a sound, a left or right choice, go/no-go impulse control and a daily challenge that is the same for everyone. See your average, your best, how you compare with other players, and challenge your friends with a link.

Six reaction tests

Test	What it measures	Typical online score
Classic	Simple visual reaction: the screen turns from red to green after a random wait.	≈ 273 ms
F1 lights	Reaction to a racing start: five lights come on one per second, then go out after a random pause.	≈ 285 ms
Audio	Reaction to a sound. Auditory reactions are usually 30 to 50 ms faster than visual ones.	≈ 235 ms
Choice	Choice reaction: decide left or right. Speed and accuracy are both scored.	≈ 395 ms
Go / No-Go	Impulse control: react to GO, hold back on STOP.	≈ 365 ms
Daily	A fixed five-round classic test that changes every day and is the same for every player.	≈ 273 ms

Average reaction time by age

Age	Visual	Audio
10–19	≈ 250 ms	≈ 210 ms
20–29	≈ 240 ms	≈ 200 ms
30–39	≈ 255 ms	≈ 215 ms
40–49	≈ 270 ms	≈ 230 ms
50–59	≈ 290 ms	≈ 245 ms
60+	≈ 320 ms	≈ 270 ms

Typical values for online tests with a mouse or touch screen. Lab measurements with special equipment are usually 30 to 60 ms faster.

How to improve your reaction time

Sleep well: tiredness is the quickest way to lose 20 to 50 ms.
Moderate caffeine can make you more alert for a short time.
Practise little and often, for example with the daily test.
Reduce system delay with a 120 to 240 Hz screen and a wired mouse or keyboard.
Exercise regularly: fitness and sports that need quick reactions both help.
Focus on the signal and keep your finger ready, but do not guess: early presses do not count.

Why this test is more accurate

Presses are timed when the browser receives the input, not when the click is processed.
The signal is timed to the exact screen frame it appears in.
Your screen's refresh rate is measured to show the timing margin.
In the Audio test, the speaker latency is compensated.
Presses before the signal are rejected and anything under 100 ms is treated as a guess.

FAQ about the reaction time test

1. What is a good reaction time?

In a browser test with a mouse or touch screen, the average visual reaction is about 250 to 280 ms. Under 230 ms is very good and under 200 ms is excellent, the level of F1 drivers and pro gamers. Hardware adds delay too, so compare scores on the same device.

2. What is the average human reaction time?

For a simple visual signal the average is about 250 ms in a lab and 270 ms in online tests, where the screen and the mouse add some delay. Reactions to sound are faster, around 200 to 230 ms, and tasks with a choice or a decision take 350 to 450 ms.

3. Why is my score different on my phone and my computer?

Each device adds its own delay: the touch screen or mouse, the screen refresh rate and the browser. A 60 Hz phone can add 30 to 60 ms compared with a 144 Hz monitor and a wired mouse. The test shows your screen's refresh rate and timing margin under the result.

4. Is reaction to sound faster than to light?

Yes. Sound reaches the brain faster than a visual signal, which first has to be processed by the eye. Auditory reactions are usually 30 to 50 ms faster than visual ones. Try the Audio test: it compensates for your speaker latency.

5. How fast are F1 drivers?

Formula 1 drivers typically react to the start lights in about 0.2 seconds, some even faster. Any car that moves within 0.2 s of lights out is treated as a jump start. In the F1 lights test, five lights come on one per second and go out after a random pause, just like a real start.

6. What does Go/No-Go measure?

Go/No-Go measures impulse control: you must react quickly to GO signals and hold back on STOP signals. Pressing on STOP is counted as a mistake and lowers your accuracy. It is a classic test used in psychology to measure attention and inhibition.

7. How does the challenge link work?

After a test, press Challenge a friend. Your test, score and name are packed into the link itself. Your friend opens it, plays the same test and sees right away whether they beat you. Nothing is sent to or stored on our servers.

8. Is my data stored?

Only in your browser. Results, personal records and history are saved on your device so you can track your progress, and nothing is uploaded. Use Clear history to delete them at any time.

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