What Is a Good Reaction Time? Averages and What Affects Them

Ask a room full of people to tap a button the moment a light turns on and most of them will land somewhere between 200 and 300 milliseconds. That window, roughly a quarter of a second, is the figure you'll see quoted most often for “average reaction time”. But the number on your screen depends heavily on what kind of reaction is being measured, how it's measured, and how you happen to feel that day.

This guide covers what typical scores look like, what counts as genuinely fast, and the factors that push your result up or down.

What reaction time actually measures

Reaction time is the delay between a stimulus appearing and your response starting. In a simple visual test (one light, one button, no decisions) that delay is made up of several stages:

• light reaching the retina and being converted into nerve signals,
• the visual system recognising that something changed,
• the brain deciding to act and sending a motor command,
• the command travelling down to the muscles and the finger actually moving.

None of these stages is instant, and none can be skipped. That's why there's a hard floor on human reaction time: responses much faster than about 100 ms almost always mean the person guessed the timing rather than reacted to the stimulus. Many tests, including ours, count anything under 100 ms as a false start.

Typical reaction times

Exact figures vary between studies and test setups, so treat these as rough bands for a simple visual test rather than precise norms:

Auditory reactions (responding to a sound) tend to be a little faster than visual ones, and touch faster still, because those signals take a shorter path through the nervous system. Choice reactions, where you must pick the right response from several, are slower again because the brain has a decision to make.

What affects your score

The test and the device

This is the factor people underestimate most. A monitor refreshing 60 times a second only draws a new frame every 16.7 ms, touchscreens and wireless mice add their own latency, and many browser tests start the clock at the wrong moment. Two honest people with identical reflexes can easily score 30–50 ms apart on different setups. We explain where that error comes from in why online reaction tests disagree.

Sleep and fatigue

Being tired is one of the most reliable ways to slow down. Sleep loss doesn't just raise your average, it makes you inconsistent, with more lapses where a response takes far longer than usual.

Attention and warm-up

Your first few attempts are usually your slowest. Focus, a few practice reps and knowing what the stimulus looks like all help. Distractions, such as notifications or conversation, do the opposite.

Caffeine

A moderate dose of caffeine tends to make people slightly faster and more alert, particularly when they're tired. It won't turn an average reaction time into an elite one.

Age

Simple reaction time is typically at its quickest in your late teens and twenties and slows gradually after that. The change is smaller than most people expect; we look at it in more detail in does reaction time slow with age?

Average versus best: which number matters?

A single fast rep can be luck. A reaction time averaged over several reps is far more telling, and the gap between your best and worst rep says a lot about consistency. That's why Reflex Trainer reports your average, best and worst for every set, and why the leaderboards are split by set length.

Find out where you stand

The quickest way to answer “is my reaction time good?” is to measure it properly: a few warm-up reps, then a set of five or ten, on the same device each time. You can take the test in your browser right now, then compare your result on the leaderboard or challenge a friend to a live duel.