๐Ÿง BrainGauge
โšก 3 game modes ยท ~10 min

Reaction Time Test

Three reflex games measured in milliseconds. The average human scores 273ms โ€” beat it.

Wait for the red box to turn green, then click as fast as you can. 5 rounds โ€” your average is your score.

The median human clocks in at 273 ms.

How fast are your reflexes, really?

When light hits your retina, the signal travels to your visual cortex, gets processed, triggers a decision, and fires a motor command down your arm โ€” all in about a quarter of a second. This free reaction time test measures that loop three different ways, in milliseconds.

The three modes

  • Simple reaction โ€” wait for green, click. Five rounds, averaged. This is the purest measure of your stimulus-response speed.
  • Choice reaction โ€” a color name appears and you must hit the matching button. Decision time gets added on top of raw speed; expect to be 100โ€“200 ms slower than simple mode.
  • Go / No-Goโ€” click green, ignore red. This is a classic neuropsychology paradigm that measures inhibitory control: the ability to stop an action that's already loading.

What affects reaction time

Age (it peaks in your early twenties), sleep, caffeine, time of day, and how alert you are all move your average by tens of milliseconds. Hardware matters too โ€” a 60 Hz display alone can add up to 16 ms versus a gaming monitor. That's why the best use of this test is tracking your own trend on the same device.

Reflexes warmed up? Pair speed with brains: the math sprint tests fast thinking, and the typing test tests fast fingers.

Frequently Asked Questions

What is the average human reaction time?๏ผ‹

For a simple visual stimulus, the median is around 273 milliseconds. Elite gamers and athletes often average under 200 ms, while anything under 250 ms is faster than most people.

What's the difference between the three modes?๏ผ‹

Simple reaction measures raw speed to a single stimulus. Choice reaction adds decision-making โ€” you must pick the right button. Go/No-Go adds impulse control โ€” sometimes the correct response is to do nothing.

Why is my reaction time slower on some devices?๏ผ‹

Monitor refresh rate, touch latency, and input lag all add tens of milliseconds. For your fastest scores, use a desktop with a mouse and compare results on the same device over time.

Can I improve my reaction time?๏ผ‹

Raw simple reaction speed is mostly physiological, but you can shave milliseconds with focus, good sleep, and practice. Choice reaction and go/no-go performance improve more, since strategy and familiarity play a bigger role.

Try another test

IQ Test

40 questions across logic, patterns, math, and verbal reasoning. Get your score instantly.

Memory Test

Two modes: repeat growing sequences, and memorize flashing tile patterns.

Spatial

Mental rotation, mirror images, and shape puzzles โ€” the visual half of IQ.