Reaction Time Test – How Fast Are Your Reflexes? (ms)

Click, tap or press Space the moment the box turns green. Five rounds, then your average, percentile and how your device affects the score.

How this reaction time test works

Press start and the box turns red. After a random wait of 1.5 to 5 seconds it turns green. Click, tap or press Space as soon as you see it. We time the gap in milliseconds (ms), and after five rounds you get your average, median, best, slowest and how consistent you were.

A few things make this test more accurate than a simple stopwatch script:

The clock starts when green is actually on screen. Many tests start timing when the code asks for green, which can be up to a full screen refresh early. We use the “animation-frame loop” method, which a 2023 study in Behavior Research Methods found gave near‑perfect display timing in browsers.
We read the exact moment of your press. The time comes from the browser's own record of the click, tap or key press, not from when our code got around to handling it.
Guesses don't count. Pressing before green is a false start, and anything under 100 ms is treated as a guess. Both just restart the round, so one lucky tap can't spoil your average.
We show what your device adds. Your screen and mouse or touchscreen add delay that isn't your fault. We detect your screen's refresh rate and give a rough estimate of that delay next to your score.

What is a good reaction time?

For a simple “see it, click it” test online, the typical result is about 250–280 ms. Large online datasets such as Human Benchmark put the median at around 273 ms. Here is how to read your average:

Average	Rating	Roughly faster than
Under 180 ms	Elite	98% of people
180–210 ms	Excellent	90–98%
210–250 ms	Above average	63–90%
250–290 ms	Average	38–63%
290–340 ms	A bit slow	10–38%
Over 340 ms	Slow	under 10%

Percentages are estimates based on published Human Benchmark figures. They assume a mouse and a normal screen; phones score slower.

If you see numbers well under 150 ms, you were probably predicting the change rather than reacting to it. Signals take time to travel from the eye to the brain and down to the hand, and very few people can do that reliably in under 150 ms.

Average reaction time by age

Reaction time does change with age, but less than most people think. The biggest study of ordinary adults, Der and Deary's 2006 analysis of 7,130 people in the UK Health and Lifestyle Survey, found that simple reaction time shows little slowing until around age 50 and then slows more quickly. Choice reaction time — where you must pick the right response, not just any response — slows steadily through adult life.

So a 25‑year‑old and a 45‑year‑old should score about the same on this test. Tiredness, alcohol, illness and your hardware usually make a bigger difference than your birthday. Children under about 12 are generally slower than adults, and teenagers and young adults tend to be at their fastest.

Why your phone or screen changes your score

Every result includes a small amount of delay from your equipment. It's usually 20–80 ms in total, which is a big chunk when differences between people are often only 30–50 ms.

Delay source	Typical effect
60 Hz screen	A new picture every 16.7 ms, so green can appear up to one frame late
120 Hz / 144 Hz screen	A new picture every 8.3 ms / 6.9 ms, so less waiting
Screen processing (TVs, “picture modes”)	From a few ms up to 50 ms or more; use “game mode” on TVs
Touchscreen	Often slower to register a tap than a mouse registers a click
Wireless mouse or keyboard	Usually small on modern gaming gear, larger on cheap Bluetooth devices
Bluetooth headphones (Sound mode)	Can add 100–200 ms; use wired headphones or speakers

The practical rule: compare like with like. A phone score should be compared with other phone scores, and a laptop trackpad with a laptop trackpad. The test notes which input you used, and your history on this device shows each result with its input so you can track real progress.

Sound vs sight: which is faster?

Most people react faster to a sound than to a light. In one small lab study, the average visual reaction time was about 331 ms and the average sound reaction time about 284 ms. That's partly because hearing signals reach the brain faster than visual signals, which need more processing in the eye first.

Switch the signal above to Sound to test it yourself. The screen stays dark and you click when you hear the beep. We use your browser's audio clock to work out when the sound actually reached your speakers, but Bluetooth delay can't be measured, so use wired audio for a fair comparison.

Reaction time for gamers

In fast games, the total delay between something happening and your action registering is your reaction time plus your system's delay. You can't change your nerves much, but you can often cut system delay:

Use a high refresh rate monitor (144 Hz or more) and turn on its fastest response mode.
Use a wired or low‑latency wireless mouse and set its polling rate to 1000 Hz.
Turn on your GPU's low‑latency mode and cap frame rate just under your refresh rate to avoid input lag spikes.
Close background apps that make frame times uneven.

Competitive players are often in the 150–200 ms range on tests like this, but much of their advantage in games comes from anticipation and practiced patterns, not raw reaction time.

Reaction time and driving

Your result shows how far a car would travel at 60 mph during your reaction time. At 60 mph you cover 88 feet (about 27 m) every second, so even a quick 250 ms reaction means 22 feet before your hands move.

Real driving is slower than this test because you aren't waiting for a signal. The UK Highway Code's “thinking distance” figures assume about 0.67 seconds. A widely cited review of driver braking studies found that fully alert drivers who expect a hazard take around 0.7 seconds to start braking, while unexpected or surprising hazards push that to about 1.25–1.5 seconds. Phones, tiredness and alcohol make it worse.

How to improve your reaction time

Sleep properly. Being short of sleep is one of the quickest ways to slow down and become less consistent.
Warm up. Do a few practice rounds before you count your score; most people get faster over the first handful of tries.
Watch the centre and stay relaxed. Keep your finger resting lightly on the mouse or screen, ready to press.
Fix your hardware. A faster screen and wired mouse can take 10–30 ms off instantly.
Practise regularly. Short daily sessions help more than one long one. Fast‑paced games and sports can help too.
Be consistent. The consistency score (±) shows how much your rounds vary. A low number means you're reacting, not guessing.

This test is for fun and self‑checking. It is not a medical or driving fitness test. If you notice a sudden change in your reactions, talk to a doctor.

Frequently asked questions

What is a good reaction time?

On an online test like this, around 250–280 ms is typical and anything under 200 ms is very fast. Scores under about 150 ms are usually guesses rather than real reactions.

What is the average human reaction time?

Large online datasets such as Human Benchmark put the median at about 273 ms for a visual click test. Lab studies with special equipment report faster numbers because they remove most device delay.

Why is my reaction time slower on my phone?

Touchscreens usually take longer to register a tap than a mouse registers a click, and many phones have 60 Hz screens. Both add delay that has nothing to do with your reflexes. Compare phone scores with phone scores.

Is this test accurate?

The timer uses the browser's high‑resolution clock, starts when the green frame is actually drawn, and reads the exact time of your click or tap. Your device still adds some delay, so we show a rough estimate of it next to your result.

Can you improve your reaction time?

Yes, a little. Sleep, warming up, practice, less caffeine crash and a faster screen and mouse all help. Most of the quick gains come from fixing tiredness and hardware, not from training your nerves.

Is reacting to sound faster than to sight?

Usually, yes. Studies find people react to a sound tens of milliseconds faster than to a light. Try the Sound mode above — but use wired headphones, as Bluetooth adds a lot of delay.

Sources

Updated: 2026-09-27