Skip to content
Kordu Tools
Gaming Runs in browser Updated 30 Mar 2026

Reaction Time Test

Measure your visual reaction time in milliseconds. Click when the screen turns green across 5 attempts and see your average, rank, and percentile vs the human average of 250ms.

Reaction Time Test

Click Start, then wait for the screen to turn green.
Click as fast as you can when it does. 5 attempts per session.

Average

—

Best

—

Personal Best

—
Loading rating…

How to use Reaction Time Test

  1. Start the test

    Click the Start button to begin. A red area will appear on screen — keep your eyes on it and wait patiently without clicking.

  2. Wait for the green signal

    After a random delay of 1–5 seconds the area turns green. The random delay prevents anticipation clicks from skewing your score.

  3. Click as fast as you can

    The moment you see green, click or tap anywhere on the colored area. Your reaction time is recorded in milliseconds from the color change.

  4. Complete five attempts

    Repeat for all five attempts. Clicking before green turns the screen red and marks the attempt as 'Too early' — it doesn't count toward your average.

  5. Review your results

    After five valid attempts, see your average time, best time, and a percentile ranking versus the human average of approximately 250ms.

Reaction Time Test FAQ

What is a good reaction time?
The average human visual reaction time is approximately 200–250ms. Anything under 200ms is considered fast. Under 150ms is exceptional and indicates excellent visual processing speed. Most competitive FPS gamers average 150–200ms after warming up. Professional esports players often test in the 130–180ms range.

How does my reaction time compare to gamers vs non-gamers?
Studies show experienced action gamers average about 190ms on visual reaction tests vs approximately 240ms for non-gamers. Gaming appears to train visual processing speed over time, though genetics and sleep quality are larger factors than training.

Why do I sometimes get 'Too early'?
Clicking before the screen turns green is flagged as an anticipation click and doesn't count. The random 1–5 second delay makes it impossible to predict the exact moment — consistent 'too early' clicks indicate you're trying to anticipate rather than react.

Does hardware affect my reaction time score?
Yes. Monitor input lag, display refresh rate, and mouse latency all add milliseconds between the actual color change and your perceived signal. A 144 Hz monitor with low input lag shows the color change about 7ms sooner than a 60 Hz monitor. Use the same device each time for consistent comparisons.

How does this compare to Human Benchmark?
Human Benchmark's reaction test uses the same green-flash methodology and similar random delays. This tool runs without an account, collects no data, and has no distractions around the test area. Results are comparable for personal tracking purposes.

Can I improve my reaction time with practice?
Yes, somewhat. Regular warm-up using aim trainers and reaction tests reduces your average by training visual attention and motor readiness. However, raw neural processing speed has a genetic floor — practice tightens consistency more than it lowers your personal minimum.

Does caffeine or sleep affect reaction time?
Yes significantly. Sleep deprivation adds 50–100ms to average reaction times. Moderate caffeine (100–200mg) can reduce reaction time by 20–30ms by improving attention. Test at consistent times of day with consistent conditions for meaningful comparisons.

How many attempts should I average for an accurate result?
Five attempts is enough for a reasonable average, but outliers (an accidental early click, a distraction) can skew a five-attempt session. For a more accurate benchmark, run three back-to-back sessions and average all 15 results.

Background

Measure how fast your brain responds to a visual stimulus with this free reaction time test. Click the screen the moment it turns green and get an instant readout in milliseconds. Each session runs five attempts so you can track consistency, not just peak speed.

A percentile ranking compares your average to the human baseline of approximately 250ms. Under 200ms is fast; under 150ms is exceptional and places you in the top percentile of measured human response. Most competitive FPS gamers average 150–200ms after warm-up.

Your personal best per session is saved locally so you can compete against yourself over time and track whether warm-up routines, sleep, or caffeine affect your reaction speed. Unlike Human Benchmark, this tool runs with no account, no data collection, and no distracting elements around the test area. Everything runs in your browser.

Related tools

CPS Test

Measure your clicks per second with precision timing. Choose from 1s to 60s modes, view a live per-second chart, and rank from Beginner to Godlike. Supports jitter and butterfly clicking.

Aim Trainer

Free browser-based 2D aim trainer with flick, precision, and speed modes. No download or account needed — practice mouse aim and track accuracy, reaction time, and scores.

Typing Speed Test

Measure your typing speed in words per minute with timed tests. Choose from English, programming, and gaming text modes with 30-second to 2-minute timers. Track WPM, accuracy, and personal bests.

Mouse Polling Rate Test

Test your mouse polling rate in Hz by moving over a tracking area. See live current, average, min, and max Hz readings with a real-time interval chart and stability score.

Keyboard Tester

Test every key on your keyboard with a visual layout. Detect ghosting, verify N-key rollover, and identify stuck keys. Works with any keyboard type — mechanical, membrane, USB, or Bluetooth.

Learn more

gaming

Average Reaction Time by Age: Chart, Ranges, and Peak Age

See average human reaction time by age, when reflexes peak, normal ms ranges, and what actually improves reaction speed.