Reaction Time Test
Click (or press Space) as soon as the box turns green. After 5 attempts you get your average reaction time in milliseconds. Most people score 200–300 ms. Part of that number is your setup, not you: the page also measures your display's refresh rate and shows how much it adds.
Reaction time test
You can't download faster reflexes, but you can stop your PC adding delay on top of them in games.
What is a good reaction time?
| Average of 5 | What it means |
|---|---|
| Under 150 ms | Very rare on a browser test. Usually a lucky anticipation: try again without guessing. |
| 150–200 ms | Excellent. Typical of well-rested, practised players on a fast setup. |
| 200–250 ms | Above average. |
| 250–300 ms | Average. Most people land here. |
| Over 300 ms | Below average. Tiredness, distraction, a 60 Hz screen or a slow mouse all push this up. |
What your PC adds to the number
Every result here is your reaction plus the delay of the chain around it. Rough figures for the main links:
| Part of the chain | Typical added delay |
|---|---|
| 60 Hz display | about 8 ms on average waiting for the next refresh (up to 16.7 ms) |
| 144 Hz display | about 3.5 ms on average (up to 6.9 ms) |
| 240 Hz display | about 2 ms on average (up to 4.2 ms) |
| Mouse at 125 Hz polling | about 4 ms on average (up to 8 ms) |
| Mouse at 1000 Hz polling | about 0.5 ms on average (up to 1 ms) |
| Browser, OS and monitor processing | a few ms to 20+ ms, depending on the browser, power mode and monitor |
In a game the chain is longer: the game has to process your click, render a frame and send it to the display. That is where frame rate, timer resolution and background load matter. The input lag guide shows how to measure it.
Frequently asked questions
What is the average human reaction time?
For a simple visual test like this one, most people score between 200 and 300 ms, with the middle of the pack around 250 ms. Part of every score is your setup: the display, mouse and browser add delay before the green appears and after you click, so the same person scores lower on a fast monitor than on a 60 Hz laptop screen.
What is a good reaction time for gaming?
Anything under 200 ms on a browser test is very good. Competitive players are usually only a little faster than average on simple tests; most of their edge comes from anticipation, crosshair placement and game sense, which a click test does not measure. Under 150 ms consistently is rare, and single results that low are usually a guess that happened to land.
Does my monitor refresh rate affect my reaction time score?
Yes. The green screen can only appear on the next refresh, so a 60 Hz display adds about 8 ms on average and a 240 Hz display about 2 ms. Monitor processing and pixel response add more on top. That is why scores are not directly comparable between setups. Check your actual rate with the refresh rate test.
Does my mouse affect the score?
A little. A mouse polling at 125 Hz adds up to 8 ms; at 1000 Hz it is under 1 ms. A Bluetooth mouse can add noticeably more than a wired or 2.4 GHz wireless one. This test registers the moment you press the button, not when you release it.
Why does the test use five attempts?
Single reactions vary by 30–50 ms even for the same person, so one result says little. The average of five is a steadier number to compare from day to day. Early clicks are thrown out and do not count toward the five.
Can I improve my reaction time?
A little, mostly by removing what slows you down: sleep, warming up, and focusing on the spot where the signal will appear. Practice also helps in games because you learn to anticipate. On the PC side, a higher refresh rate, a 1000 Hz mouse and lower system latency trim delay that has nothing to do with your reflexes.