Reaction Time Guides
The long reads. Every claim carries a citation, and every number comes from published research or a test you can run yourself here.
GUIDES
3 total
ARTICLES
12 more
COST
Free
8 min read
The Ultimate Guide to Human Reaction Time
Benchmarks, the neuroscience, eyesight, training and a four-week plan — the whole reaction-time picture in one place.
Updated · 9 August 2026Read
8 min read
How Sleep, Caffeine and Alcohol Change Your Reaction Time
Sleep debt, caffeine timing, the hangover you can still measure, and the hours your body runs slowest: the state factors that decide your score before you click.
Updated · 7 September 2026Read
10 min read
How Athletes Beat a Clock They Cannot Outrun
A 100 mph fastball is gone in 375 ms while a simple reaction costs 250 ms, so the batter is beaten before the pitch is thrown. What occlusion studies, predictive saccades and the 0.100 s false start rule reveal about the skill doing the real work.
Updated · 13 September 2026Read
Learn
Shorter reference pages
One question, one answer, backed by the tables and sources behind it. Begin here when you want a number rather than the whole picture.
All articles
What Is Reaction Time?
The definition, why a reflex is not a reaction, and how reaction time differs from response time.
What Is the Average Human Reaction Time?
About 250 ms for visual and 170 ms for audio stimuli. Full tables by age, sport, and test type.
What Is a Good Reaction Time?
Is 200 ms good? See percentiles, what counts as a good score by age and device, and what affects your result.
Reaction Time World Record
What's actually possible, why sub-100 ms is ruled a false start, and why most online "records" aren't real.
How to Improve Your Reaction Time
Evidence-based ways to get faster — sleep, practice specificity, sport drills — and the myths that don't work.
How to Test Your Reaction Time
Compare online tests, the ruler drop method, apps, and lab methods — with accuracy notes for each.
Ruler Drop Test Conversion Chart
Distance in cm to reaction time in ms, the physics behind it, and a printable classroom version.
F1 Driver Reaction Times
Real launch reaction ranges, how the FIA light system works, and famous jump starts.
Pro Gamer Reaction Times
Published reaction time ranges for CS2 and FPS pros, how monitor Hz changes your score, and how to compare.
Reaction Time by Age
Reaction time peaks around age 24 and declines slowly after. See averages by age group and test yourself.
Reaction Time and Attention
How continuous reaction tests relate to attention research — and why this isn't an ADHD screening tool.
Driver Reaction Time and Stopping Distance
A surprise hazard costs about 1.5 seconds, not the 0.75 seconds taught in driver's ed. Both figures, and what each one adds in distance.