Microsoft Windows
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Windows ServerReaction Time Test: How Fast Are You?
Click the blue box, wait for green, click again. Simple. The tool shows how many milliseconds you needed. Try it 5 times to get your average.
How it works
Blue screen. You click. Red screen appears. You wait. Green screen pops up at a random moment. You click. Done. The random delay is there so you can’t just guess the timing.
Your score
| Time | Level | Who gets this |
|---|---|---|
| Under 150ms | Exceptional | Esports pros, Olympic sprinters |
| 150 to 200ms | Fast | Gamers, young adults |
| 200 to 250ms | Average | Most people |
| 250 to 300ms | Below average | Tired, distracted |
| Over 300ms | Slow | Very tired, drunk, sick |
Somewhere around 220ms? That’s normal, most people land there. Below 200ms is solid. Below 150ms means you’re either gifted or got a lucky click.
What slows you down
No sleep
Stayed up all night? Your reaction will be garbage. Like, 20 to 30 percent slower. Not a little bit. A lot. Sleeping 6 hours instead of 8 already shows up in the numbers.
Getting older
Reflexes peak around 24. Then they drop. Slowly, but they drop. A guy at 60 is typically 30 to 40ms slower than he was at 25. But here’s the thing: a fit 50 year old who runs and sleeps well can easily beat a lazy 25 year old who eats junk and plays games all night.
Drinking
One beer won’t destroy your reflexes. But two or three? You’ll notice it. And if you’re actually drunk, forget it. Your reaction time tanks.
Medications
Allergy pills can slow you down. Sleep aids too. Painkillers, muscle relaxants. If the label says “may cause drowsiness” then yeah, your reflexes take a hit.
Your setup
Old 60Hz monitor? It refreshes every 16ms. So even if your brain reacts instantly, you might wait 16ms for the screen to update. Gaming monitor at 144Hz? That’s 7ms. Wireless mouse adds a few ms too. Not a big deal for casual use, but if you want accurate numbers, wired mouse plus fast monitor helps.
What makes you faster
Coffee
Two cups, wait half an hour, and you’re 5 to 10 percent quicker. Lasts a few hours. But if you drink too much you get shaky and that makes things worse.
Working out
People who exercise regularly have faster reactions. Not just right after a workout. All the time. Cardio seems to help the most. Running, cycling, whatever gets your heart pumping.
Practice
Take this test every day for a week. You’ll probably improve by 10 to 20ms. Not because your nerves got faster. Your brain just gets better at this specific task. It learns what to expect and reacts quicker.
Focus
Close your other tabs. Put down your phone. Look at the screen. Sounds obvious, right? But distracted people score 20 to 30ms slower than focused people. Every time.
Where this matters
Games
CS2, Valorant, Apex. Two players spot each other. One reacts in 180ms, one in 200ms. The faster one wins. That 20ms gap decides fights. Pros usually hit 140 to 180ms on tests like this.
Driving
60 mph means 88 feet per second. Something happens, you need 250ms to hit the brake. By then you’ve already rolled 22 feet. At highway speed, those extra feet can mean crash or no crash.
Sports
90 mph fastball takes 400ms to reach the plate. The swing takes 150ms. So you have maybe 250ms to decide yes or no. There’s no time to think. You just react or you miss.
A boxer throws a jab. It lands in 200 to 300ms. If you react at 250ms, you can’t block what you didn’t see coming. You have to read it before it happens.
About accuracy
Browser tests aren’t perfect. Your real reaction is probably 10 to 30ms faster than what you see here. The delay comes from your monitor, your browser, your mouse. But for comparing yourself against yourself or against friends? Works fine.
Frequently Asked Questions
What’s a good score?
Under 250ms is good. Under 200ms is really good. Under 150ms is crazy fast, probably you’re either a pro or you just got lucky.
Why do I get different numbers each time?
Because you’re human. Your focus changes, your alertness changes. Even your heart rate affects it. Variation of 20 to 40ms between tries is totally normal.
Can I get faster?
A bit. You can’t change how fast your nerves work. But you can learn to focus better and react to this specific test faster. Most people improve 10 to 20ms with practice.
Is sound faster than sight?
Yep. Your ears are quicker than your eyes. Sound reactions clock in around 140 to 160ms. Visual ones run 180 to 200ms.
What’s the world record?
Hard to say. In labs, some people hit 100 to 120ms. In sprinting, anything under 100ms counts as false start because humans just can’t react that fast to a gun.
Phone or computer?
Computer is more accurate. Phone touchscreens have more delay. But phone works fine for fun. Just don’t compare phone scores to computer scores directly.