How to use the Reaction Time Test
- Click or tap the box to start. It turns red.
- Wait. After a random delay, the box turns green.
- Tap, click or press Space the instant you see green. Tapping too early doesn't count, so just try again.
- Repeat five times to get your average and best time. Tap again to start a new round.
What's a good reaction time?
For a simple visual test like this, most people score between 200 and 300 milliseconds, and typical online results sit around 250–275 ms. Under 200 ms is very fast, and consistent scores under 180 ms are rare. Your average over several tries is a better measure than a single lucky click, which is why the test uses five.
- Under 180 ms: exceptional
- 180–220 ms: very fast
- 220–260 ms: above average
- 260–300 ms: average
- Over 300 ms: slower than average, often because of tiredness, distraction or a slow device
Your device affects your score
Part of every result is hardware delay: the screen has to draw the green frame, and your mouse, touchscreen or keyboard has to report the press. A 60 Hz screen alone can add up to about 16 ms, and wireless mice and some phones add more. For the fairest comparison, test on the same device each time. A wired mouse and a high-refresh-rate monitor give the lowest numbers.
How to improve your reaction time
- Sleep well. Tiredness is the biggest single cause of slow reactions.
- Warm up. Your first few tries are usually your slowest.
- Focus on the change, not your finger. Keep your eyes on the box and stay relaxed.
- Practise. Gamers and athletes improve with regular short sessions, though gains level off after a while.
Reaction time also tends to slow gradually with age, and sound is processed faster than sight: people react to a beep in roughly 150–200 ms.
Frequently asked questions
What is the average human reaction time?
For a visual test like this one, the average is roughly 250 milliseconds, with most people between 200 and 300 ms. Results depend on age, alertness and the device you use.
Is 200 ms a good reaction time?
Yes. 200 ms is faster than most people. Professional esports players and sprinters often average in the 150–200 ms range.
Why does my score change so much between tries?
Small differences in attention and anticipation add up. That's why the test averages five tries. Ignore single outliers and compare averages.
Can I use the keyboard?
Yes. Press Space or Enter instead of clicking. Many people find the keyboard slightly faster than a mouse.
Why did it say Too soon?
You tapped before the box turned green. The delay is random, between 1.5 and 5 seconds, so guessing doesn't work. Early taps don't count toward your average.
Is my score saved?
No. Nothing is stored or sent anywhere. Your results disappear when you leave the page.