The Reflex Test is a free online reaction time measurement tool that tells you exactly how fast your reflexes are in milliseconds. When a visual cue appears on screen, you click as quickly as possible, and the test records your response time. The average human reaction time to a visual stimulus is 200-250 milliseconds, though professional gamers and athletes often score below 180ms. Over 100 million reaction time tests are taken online each year.
Wait for the screen to change color, then click as fast as you can. The test measures the time between the visual stimulus appearing and your click in milliseconds. You take multiple attempts and get a median score. Your result is then compared to benchmarks including the average human, a competitive gamer, a fighter pilot, and a housefly.
A good reaction time for a visual stimulus is around 200-250 milliseconds. Competitive gamers typically score 150-200ms, while professional esports players and fighter pilots can achieve 120-160ms. Anything under 200ms is considered above average.
The average human reaction time to a visual stimulus is approximately 200-250 milliseconds. This varies with age (fastest in your 20s), fatigue, and alertness. Auditory reaction times are slightly faster at about 150-200ms because sound signals are processed more quickly by the brain.
You can improve reaction time through regular practice with reaction time tests, getting adequate sleep (7-9 hours), staying hydrated, and playing fast-paced video games. Physical exercise also improves neural processing speed. Most people see measurable improvement within 1-2 weeks of daily practice.
If you enjoyed this, try these: Aim Trainer · Speed Click Test · Spacebar Test · Reaction Queue
Last updated: March 2026 · whatifs.fun — Free interactive games, experiments & simulations