ReactScore
The device-lag-corrected reaction test

Know your true reaction time

Every browser test silently adds 10 to 50 ms of screen and mouse lag. We measure yours, subtract it, and show the honest number, raw and corrected, side by side.

Click to start

Wait for the screen to turn green, then click as fast as you can. Five tries: we take the median.

We measure your display's refresh lag before scoring. Most tests don't. How we measure →

  • Corrected for device lag
  • Raw + corrected score
  • Median of 5 · guesses binned
  • Percentile & reflex age
81M+
clicks analysed
13
reaction tools
100%
free, no sign-up
0
data leaves your device
Why our number is different

Every other test lies to you by 10 to 50 milliseconds

Your screen and your mouse both add delay before you ever see the green or your click registers. Most tests quietly count that against you. We measure it and take it back out.

We hand you a receipt, not a guess

Before you start, ReactScore measures your display's refresh and the input lag on your device, then shows your raw time and a device-lag-corrected time side by side, with the margin instead of hiding it. Wireless mice and 60 Hz screens add a few milliseconds that are not your reflexes, yet most tools quietly bake them into your score. If a tool will not admit its own error bars, do not trust the number it gives you.

Then the scoring: five goes, and we report the median, because reaction times are lopsided and one phone buzz would drag a mean around. We bin anything under 100 ms, since nobody reacts that fast, that is a guess, not a reaction. The full method is on the methodology page.

Raw click-to-click281 ms
− display lag (60 Hz)16 ms
− input latency12 ms
Your true time253 ms
Where you stand

The average reaction time is about 273 ms

That number surprises people. A real reaction is a whole chain, light hits your retina, travels to your visual cortex, your brain decides, then the command reaches your hand, and the deciding part is where most of the time goes. It also slows a few milliseconds per decade after your twenties. Find your age below, then go beat it.

Mean reaction time by age group

Visual stimulus · device-lag corrected · ms (lower is faster)

The 273 ms median is from the Human Benchmark public dataset (81M+ clicks); age ranges reflect published norms on an online-click scale from MindCrowd (npj Aging 2021) and Der & Deary 2006. Full data and method →

More ways to test

One reflex, 12 more ways to push it

The classic test up top measures simple visual reaction. But a sprinter on the gun, an F1 driver on the lights, and a gamer tracking a target are each doing something slightly different. Every tool below isolates one of them, and shares the same honest scoring engine.

Reaction Age TestSee the age your reflexes match.Only on ReactScoreDriving Reaction TestYour reaction turned into real stopping distance.Only on ReactScoreRuler Drop TestThe classic physics method, simulated.Only on ReactScoreDaily ChallengeOne shared test a day. Keep your streak.Only on ReactScoreF1 Reaction TestLaunch off the five red lights.Aim TrainerClick targets fast and accurately.Audio Reaction TestReact to a tone, not a color.Reaction Time GameStreaks, levels and a running score.Go / No-Go TestReact to GO, hold on NO-GO.Color Reaction TestReact only to the right color.Choice Reaction TestHick's law in action.2-Player Reaction TestSettle it head-to-head.
Straight answers

The questions everyone asks

What is a good reaction time?
On an online click test like this one, anything under 250 ms is quick and under 200 ms is genuinely fast: that is roughly pro-gamer territory. The typical result sits around 270–280 ms. Lab equipment reads lower (200–250 ms) because it skips the screen and mouse lag a browser cannot avoid. See what counts as a good time.
What is the average human reaction time?
Across the largest public dataset (81 million-plus clicks), the median online reaction time is 273 ms and the mean is 284 ms. In a lab the simple visual figure is closer to 200–250 ms. We break the numbers down by age on the average reaction time page.
Why is my score slower here than the “200 ms” I read about?
Because every web test adds 10–50 ms that has nothing to do with your brain: your monitor only refreshes every 8–17 ms, and the mouse, OS and browser each add a little. We measure your display and show a device-lag-corrected time so you can compare fairly. The honest details are on our methodology page.
How is the test scored?
You take five attempts and we report the median, not the average, because reaction times are skewed. One distracted, slow click would drag a mean around. We also throw out anything under 100 ms, which is faster than a human can actually react and means you guessed.
Can I improve my reaction time?
A bit: most people can shave 10–20% with sleep, the right amount of caffeine, and regular practice, then they hit a wall set by biology. We wrote an evidence-based guide to improving your reaction time.

Written and built by

Lokesh Rathore · Founder of ReactScore

Lokesh Rathore is the founder of ReactScore and the person behind everything on it. Reflexes and reaction time are a genuine fascination of his, so he built the test he wanted to use himself: one that measures honestly, corrects for the lag your screen and mouse add, and explains the numbers instead of hiding them. He keeps every figure on the site grounded in public datasets and published research. More about the project →

Stop guessing. Get your honest number.

Five clicks, about thirty seconds, no sign-up. See exactly how fast you really are.

Take the reaction test →