# Reaction Time Test

> Measure your visual reaction time in milliseconds over five rounds, with a median score and per-trial breakdown.

URL: https://uttir.com/reaction-time-test
Categories: web-tools, calculators
Privacy: The whole test runs in your browser. Reaction times are not sent anywhere and nothing is stored.

## About

This test measures how quickly you respond to a visual signal. The panel turns red ("wait") for a random interval, then flips to green — click (or press space) the instant it does. Five rounds produce a per-trial list, and the median is your score, which filters out one lucky or unlucky round.

The delay before green is randomized between 1 and 4 seconds so you cannot anticipate the signal — anticipating is what "too soon" detects, and that round gets retried.

For reference: visual reaction time for most adults lands around 200-300 ms, with roughly 250 ms as the commonly cited average. Gamers and pilots often train into the low 200s.

## How to use

1. **Click to start** — The panel turns red — this means "wait".
2. **Click the instant it turns green** — Your time in milliseconds is recorded for the round.
3. **Complete five rounds** — Clicking during the red "wait" phase adds a retry for that round.
4. **Read your median** — The median of five rounds is your score, with best, average, and worst alongside.

## Examples

### Score guide

How median reaction times compare.

Output:

```
Under 200 ms is exceptional, 200-250 excellent, 250-300 above average, 300-400 average for a relaxed session.
```

## FAQ

### What is a good reaction time?

Around 250 ms is the typical human visual reaction time. Anything under 200 ms is excellent; elite esports players average in the 150-200 ms range.

### Why did it say "too soon"?

You clicked before the green signal appeared, which would have produced a meaningless negative time. The round restarts so your score stays honest.

### Why use the median instead of the average?

The median ignores one outlier round — a single stumble or a fluke fast click — so five rounds give a fair picture of your real reflexes.

### Does screen lag affect my score?

Slightly, yes. Display latency (especially on TVs or high-latency wireless displays) adds to your measured time. Testing on the same setup keeps comparisons fair.

## Related tools

- [Click Speed Test](https://uttir.com/click-speed-test) — Measure your clicks per second (CPS) over 1, 5, 10, or 30 seconds. Works with touch too, and keeps your personal best on this device.
- [Typing Latency Test](https://uttir.com/typing-latency-test) — Measure the rhythm between your keystrokes — median gap, steadiness, and longest pause. Different from a words-per-minute test.
- [FPS Benchmark](https://uttir.com/fps-benchmark) — Measure your display's real refresh rate and frame delivery stability in a 10-second test.

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For the full HTML page with the live tool, visit https://uttir.com/reaction-time-test.
This file is the markdown rendering at https://uttir.com/reaction-time-test.md. See https://uttir.com/llms.txt for a site-wide summary.