To get the most accurate result from the reaction time test, follow these three simple steps:

🧘 1. Relax and remove distractions

Find a quiet moment and give the test your full attention. A calm, focused mind reacts noticeably faster than a tired or distracted one, so silence notifications and settle in before you begin.

👆 2. Wait for green, then react

Start the test and watch the panel. The instant it turns from red to green, click, tap, or hit the space bar as fast as you can. React too early and the test flags a false start, so let the signal lead.

🎮 3. Repeat and beat your best

A single attempt can be lucky or unlucky. Play several rounds — your best and average reaction times tell the real story, and a few warm-up tries almost always sharpen your score.

Try all our reaction tests

Reaction time is just the start. Each of our tests trains a different skill — pick one and see how you score:

⚡ Reaction Time Test • 🎯 Aim Trainer • 🔊 Audio Reaction Time • 🖱️ CPS Test • 🚦 Go / No-Go • 🔢 Sequential Targets

What is a reaction time test?

A reaction time test measures the short interval between a stimulus appearing and your response to it. The version on this page is a visual reaction time test: a panel changes colour, and the clock runs from that moment until you click, tap, or press a key. The result, expressed in milliseconds (ms), is a snapshot of how quickly your eyes, brain, and hand work together. Because the delay before the signal is randomised, you cannot anticipate it, so the test captures a genuine reaction rather than a guess.

How our reaction time test works

When you start, the panel shows red and asks you to wait. After a random delay of one to several seconds it turns green, and a high-resolution browser timer begins counting. The moment you respond, the timer stops and your reaction time is shown. If you act before the green signal appears, the test records a false start so your numbers stay honest.

Every attempt is stored on your device, your single best time is highlighted, and you can run unlimited rounds. We recommend taking at least five to ten attempts: reading your best, or your average, is far more reliable than judging yourself on one click.

What is human reaction time?

Human reaction time is the time that passes between your brain perceiving a stimulus — visual, auditory, or tactile — and your body producing a response. It is not a single fixed number; it depends on the type of signal, your age and physical condition, your level of alertness, and how many choices you have to make. A simple reaction (one signal, one response) is fastest, while adding a decision, as in a Go / No-Go task, lengthens it. Reaction time reflects how efficiently your nervous system processes information, which is why it is widely used in psychology, sports science, and medicine.

What is the average reaction time?

For a simple visual reaction time test, the average adult scores between roughly 200 and 250 milliseconds. Reactions to sound or touch are typically a little faster, because those signals reach the brain more directly. The figures below put a typical result in context.

Average reaction time by age

Reaction time improves through childhood, peaks in the late teens and twenties, and slows gradually afterwards. These are typical averages and vary from person to person:

Children (under 12) — around 250–400 ms, still developing.
Teenagers (13–19) — around 200–250 ms, approaching their fastest.
Adults (20–39) — around 200–250 ms, the quickest years for most people.
Adults (40–59) — around 250–300 ms, a gentle slowdown.
Adults (60+) — around 300 ms and above, though staying active and well-rested keeps scores sharp.

Average reaction time by signal type

Visual — roughly 200–250 ms; the standard reaction time test.
Auditory — roughly 150–200 ms; sound is processed slightly faster than sight.
Touch — roughly 150–200 ms; physical contact reaches the brain quickly too.

What is a good reaction time score?

On a visual reaction time test, here is a rough guide to how results compare:

Under 150 ms — exceptional, typical of trained esports players and athletes.
150–200 ms — excellent, faster than the large majority of people.
200–250 ms — above average; a strong, healthy result.
250–300 ms — average for most adults.
Over 300 ms — slower than average, often due to fatigue, distraction, or a high-latency setup.

Scores depend on your screen, input device, and focus, so compare results taken under similar conditions.

What affects your reaction time?

Many factors push your reaction time test score up or down from one attempt to the next:

Age — reactions are fastest in early adulthood and slow gradually with age.
Alertness and fatigue — you are quickest when well-rested; tiredness, stress, and boredom all add milliseconds.
Practice — repeated exposure trains your brain to process the signal faster.
Stimulants and diet — caffeine can give a small short-term boost, while dehydration and poor nutrition slow you down.
Type of task — a simple reaction is faster than one that requires a decision.

The impact of your screen and hardware

Because an online reaction time test runs through your device, your setup influences the result:

Display refresh rate — a 120 Hz or 144 Hz screen shows the colour change sooner than a 60 Hz monitor, shaving a few milliseconds off your apparent reaction time.
Input latency — gaming mice and keyboards register clicks faster than standard office peripherals or touchscreens.
System performance — a laggy or overloaded computer can delay both the signal and your response, so close heavy programs first.

These effects are usually small, but they explain why the same person can score differently on two machines.

How to improve your reaction time

Reaction time is trainable. A combination of regular practice and healthy habits produces real, measurable gains:

Practise regularly — short, frequent sessions on a reaction time test or reaction drills beat occasional long ones.
Sleep well — rest is the single biggest lever; a tired brain reacts slowly.
Stay active — cardio and agility training are proven to improve reaction speed.
Eat and hydrate well — omega-3s, antioxidants, and enough water all support fast cognitive processing.
Cut distractions — train in a quiet space so your full attention is on the signal.
Optimise your gear — a high-refresh screen and a low-latency mouse remove avoidable delay.

Types of reaction time tests

“Reaction time” covers several distinct skills, and CheckReactionTime.org offers a dedicated test for each:

Visual reaction time test — respond the instant the screen changes colour, the classic test on this page.
Audio reaction time test — react to a sound instead of a visual cue.
Go / No-Go test — respond to the correct signal and hold back on the wrong one, measuring decision speed as well as raw reaction.
Aim and target tests — hit moving or numbered targets to combine reaction time with accuracy, ideal for gamers.

Trying several gives a fuller picture of your reflexes than any single number can.

Reaction time test FAQ

How accurate is this online reaction time test?

Our reaction time test times the gap between the green signal and your click with your browser’s high-resolution timer, so it is accurate to within a few milliseconds. The biggest source of variation is your own hardware — refresh rate and input lag — rather than the test itself.

What is a good reaction time?

For a visual reaction time test, anything under 250 ms is a solid result and under 200 ms is excellent. Most people score between 200 and 300 ms.

What is the fastest possible human reaction time?

The practical floor for a simple visual reaction is around 100–120 ms, the time your nervous system needs to carry the signal from eye to hand. Scores below that almost always mean you anticipated the cue rather than truly reacting.

Does age affect reaction time?

Yes. Reaction time is usually fastest in your late teens and twenties and slows gradually with age, though good rest and regular practice help at any age.

Is reaction time the same as reflexes?

Not quite. A true reflex, like a knee-jerk, bypasses the brain and is faster, while reaction time involves perceiving a stimulus and choosing to respond. A reaction time test measures the latter.

Can I improve my reaction time?

Yes — regular practice, good sleep, exercise, hydration, and a low-latency setup all help lower your reaction time over time.

How many times should I take the test?

Take at least five rounds and use your best or your average rather than a single attempt, since one try can be skewed by a lucky guess or a lapse in focus.

Why is my reaction time slower on this computer?

A low-refresh-rate screen, a high-latency mouse or touchpad, or a busy system can each add a few milliseconds. For your fastest scores, use a high-refresh monitor and a wired mouse, and close heavy programs.

Is the reaction time test free?

Yes — every reaction time test on CheckReactionTime.org is completely free, runs in your browser with no download, and can be taken as many times as you like.