Reaction Speed
Reaction speed tests measure the time between a stimulus appearing and your response — in milliseconds. The classic test is simple: wait for the signal, respond as fast as you can, and repeat enough rounds to separate your true reaction time from luck. False starts are detected and don't count.
Tests in Reaction Speed
Reaction Time Test
Free reaction time test. Five rounds of wait-for-green, with average and best reaction in milliseconds, round spread, and false-start detection.
Click Speed Test
Free CPS test. Click as fast as you can for 5 or 10 seconds and measure your clicks per second, with personal bests saved locally.
Aim Trainer
Free aim trainer. Hit 20 targets as fast as you can — average time per target, accuracy, and misses, with personal bests saved locally.
Why It Matters
This task gives you a repeatable browser measurement of one wait-for-signal response. Screen, browser, device, posture, and anticipation all affect the recorded milliseconds, so compare averages and spreads on the same setup and do not use the result to infer driving fitness, athletic ability, fatigue, impairment, or health.
Related Guides
How to Improve Your Reaction Time
Learn what this browser reaction test measures, how hardware affects the result, and how to build a repeatable personal baseline.
Reaction Time Results: Build a Fair Baseline
Interpret browser reaction time without unsupported norms, account for setup effects, and compare your own five-round results fairly.
Click Speed: Build a Comparable CPS Baseline
Compare clicks per second using the same duration, device, and technique, and keep repetitive practice comfortable.
Aim Trainer Results: Time, Accuracy, and Misses
Build a personal aim baseline, read time beside accuracy and misses, and compare runs made with the same setup.