TEST YOUR
REFLEXES & BRAIN
9 free browser-based tests measuring your reaction time, typing speed, click rate, working memory and more. Scientifically designed, instant results — compare yourself to the world average.
Every test runs instantly in your browser — no sign-up, no download. Results are shown immediately after each session.
Reaction Time Test
Measure how fast you respond to a visual stimulus in milliseconds. 5 rounds, automatic scoring, ratings from Slow to Legendary. The gold standard reflex test used by gamers and athletes worldwide.
Typing Speed Test
Measure your typing speed in words per minute. Real-time WPM, accuracy percentage, and instant comparison to world averages.
Number Memory Test
How many digits can you memorize? Each level adds one more number. Average adults remember 5–7 digits — can you beat that?
Click Speed Test
Test your clicks per second across 8 durations (1s–100s). See your raw CPS and compare against average and elite scores.
Jitter Click Test
Practice the jitter clicking technique used by top Minecraft PvP players. Tense your arm muscles to achieve maximum CPS.
Spacebar Speed Test
How fast can you press the spacebar? Choose your duration and challenge your friends to beat your hits-per-second record.
Stimulation Clicker
Hit moving targets to train your mouse accuracy and click speed simultaneously. Perfect for FPS and battle royale gamers.
Dinosaur Game
The classic Chrome T-Rex runner — online, free, anytime. Jump over cacti, dodge pterodactyls, survive as long as you can.
Coreball Game
Shoot balls onto a rotating core without hitting existing ones. Progress through levels with increasing speed and danger balls.
Why Test Your Reflexes?
Your reaction time is one of the most measurable aspects of cognitive performance. Research shows it correlates with athletic ability, gaming skill, and even general health markers.
Regular testing helps you track improvements, identify fatigue, and benchmark yourself against population averages. Elite gamers typically react 30–50ms faster than the general population — a difference that is trainable.
All our tests are browser-based, requiring no downloads or accounts. Results are calculated locally and displayed instantly — your data never leaves your device.
Everything you need to know about reflex and brain testing.
How do you compare? Here's what scores mean across our most popular tests.
| Test | Below Average | Average | Good | Elite |
|---|---|---|---|---|
| ⚡ Reaction Time | >300ms | 200–250ms | 150–200ms | <150ms |
| 🔥 Click Speed | <5 CPS | 6–7 CPS | 8–10 CPS | >14 CPS |
| 📝 Typing Speed | <30 WPM | 40–55 WPM | 60–80 WPM | >100 WPM |
| 🧠 Number Memory | <5 digits | 5–7 digits | 8–10 digits | >11 digits |
| ⌨️ Spacebar | <5 HPS | 7–9 HPS | 10–13 HPS | >15 HPS |
What Is the Average Human Reaction Time?
The average human reaction time to a visual stimulus sits between 200 and 250 milliseconds — roughly one-quarter of a second. That gap between seeing something and responding to it is where reflexes live, and it's measurable down to the millisecond.
The delay happens in layers: light hits your retina, the signal travels along the optic nerve (~20–40ms), your visual cortex processes the image (~80–100ms), your brain decides to act, and finally your muscles fire. Every step adds time.
Age is the biggest natural factor. Reaction time peaks in your early 20s and gradually increases from there. Fatigue, caffeine intake, screen brightness, and time of day can shift your score by 20–40ms on any given session.
Fun fact: The fastest recorded human reaction time in a controlled setting is around 101ms. The theoretical minimum — limited by nerve conduction speed — is approximately 80–100ms. No human can react faster than their neurons allow.
What Is a Good Reaction Time in ms?
"Good" depends entirely on your context. Here's how scores break down across different populations:
- Under 150ms — Exceptional. Seen only in elite esports athletes with dedicated training.
- 150–190ms — Pro-level. This is the range where professional gamers operate.
- 190–220ms — Above average. You're faster than most people.
- 220–250ms — Average. Exactly where most healthy adults land.
- 250–300ms — Slightly below average. Sleep and consistent training can push this down.
- 300ms+ — Below average. Often linked to fatigue, stress, or poor sleep.
One important note: browser-based reaction time tests read slightly higher than lab conditions. Monitor refresh rate (60Hz adds ~8ms, 144Hz adds ~3ms) and mouse latency (5–15ms) both inflate your result. Your true neurological reaction time is likely 10–20ms faster than your score.
Gamer Reaction Time — Does It Actually Matter?
Short answer: yes — but not as much as most people think, and it's more trainable than most people believe.
Studies on professional esports players consistently show average reaction times between 150 and 190ms, compared to 220–250ms for non-gamers. The gap is real. But the reason isn't entirely genetic — it's largely pattern recognition and anticipation. Pro players don't just react faster; they predict better.
Raw speed vs. game sense
A 30ms difference in reaction time equals about 1–2 frames on a 60fps monitor. That's real, but it won't win games on its own. What separates ranks is the ability to pre-aim, read rotations, and reduce cognitive load so your reactions become closer to reflexes than decisions.
That said: faster reaction time gives a measurable edge in clutch moments — 1v1 duels, peeker's advantage scenarios, and close-range fights where the first click wins. Every millisecond is real.
How to Improve Your Reaction Time
Reaction time is trainable. Research shows meaningful improvements are possible with consistent practice, especially under 30 — but people of all ages see real results.
1. Practice consistently
Use our reaction time test daily as a warm-up. 5–10 minutes of focused reaction training before a gaming session beats hours of passive play. Consistency over weeks beats intensity over days.
2. Upgrade your hardware
A 144Hz or higher monitor reduces input lag significantly. A wired mouse with 1000Hz polling rate adds real responsiveness. These don't improve your neurology — but they cut the gap between intention and on-screen action.
3. Sleep is a performance tool
Sleep deprivation is one of the most reliable ways to slow your reaction time. Studies show 24 hours without sleep impairs reaction time by the same margin as a 0.1% blood alcohol level. Eight hours isn't optional for peak performance.
4. Reduce cognitive load
Decision time is part of reaction time. The more options your brain evaluates, the slower the response. Practice until actions become automatic — muscle memory is just reaction time minus the thinking step.
5. Exercise and stay hydrated
Cardiovascular exercise increases blood flow to the brain. Even a 20-minute walk before a session can improve your scores. Dehydration slows neural transmission — drink water before you test.
Quick tip: Test yourself at the same time each day for the most consistent data. Reaction time naturally dips in the morning, peaks in early afternoon, and drops again late at night.
Frequently Asked Questions
How accurate is an online reaction time test?
Browser-based tests are consistent but not lab-accurate. Hardware latency (monitor refresh rate + mouse delay) typically adds 10–20ms to your true neurological reaction time. Use it for relative comparison and tracking progress — not as an absolute medical figure.
What is a good reaction time for gaming?
For competitive gaming, anything under 200ms is considered good. Pro-level players typically score 150–190ms. Game sense, positioning, and aim training matter far more than raw speed at most skill levels.
Does reaction time get worse with age?
Yes, gradually. Reaction time peaks in the early 20s and increases by about 10–15ms per decade. Active training and a healthy lifestyle significantly slow this decline — many 40-year-olds who train outperform sedentary 20-year-olds.
Why is my reaction time different each session?
Time of day, sleep quality, caffeine, stress, and even hand temperature all affect your score. Track your average across 5+ sessions rather than judging yourself on a single result.
Can caffeine improve reaction time?
Yes, in moderate amounts. Research shows 200–400mg of caffeine (roughly 2 cups of coffee) can improve reaction time by 10–30ms, particularly when you're fatigued. Effects peak around 30–60 minutes after consumption.
What's the difference between simple and choice reaction time?
Simple reaction time: one stimulus, one response (click when you see green). Choice reaction time: multiple stimuli, different responses. Choice RT is always 50–100ms slower and is more relevant to real gaming scenarios.