Reaction Time

Measure how fast you react to visual stimuli. Click when the screen changes color.

Difficulty:EasyAvg:245msPlays:2.4M

Press SPACE or click

How it works

Screen turns from red to green at a random interval. Click or press SPACE as fast as possible when it changes.

Controls

SPACE or Click

Mouse and touch input also work.

Metric

milliseconds (ms)

Average

245ms

Difficulty

Easy

Plays

2.4M

What Is a Good Reaction Time Score?

The current BrainRivals average for this test is 245ms. Use that as a baseline, then compare against your saved personal best and the public leaderboard for this specific test.

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What It Tests

Visual reaction speed and hand-eye coordination. Measures the time between stimulus and response.

How It Works

Screen turns from red to green at a random interval. Click or press SPACE as fast as possible when it changes.

Why It Matters

Reaction time is crucial for gaming, driving, sports, and emergency response. Professional esports players average 150-180ms.

Tips to Improve

  • 01Stay focused on the center of the screen
  • 02Keep your finger ready on the mouse or SPACE key
  • 03Don't anticipate - wait for the actual color change
  • 04Take breaks between attempts to maintain focus

Tools

Reaction Time Calculator

Interpret your reaction time score and see what tier it maps to.

Input Lag Estimator

Estimate setup latency from measured and expected reaction time.

Monitor Hz Reaction Estimator

Estimate display-frame delay at common refresh rates.

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Reaction Time | Free Online Cognitive Test by BrainRivals