Games
Reaction Time Test — How Fast Are Your Reflexes?
Measure your reaction time in milliseconds. Click when the screen turns green — 5 rounds, immediate results, free and private.
Click the button as soon as it turns green. 5 rounds — your average reaction time in milliseconds is your score. Clicking before green adds a penalty round.
How it works
Reaction time is measured from the moment the button turns green to when you click, using performance.now() which has sub-millisecond precision. The test runs 5 rounds and reports your average. Human reaction time averages around 250ms; trained athletes typically reach 150–200ms. Percentile rankings are based on humanbenchmark.com population data.
Frequently Asked Questions
- What is the average human reaction time?
- Average human reaction time to a visual stimulus is around 200–250ms. Athletes and gamers often reach 150–200ms with training.
- Can reaction time be improved?
- Yes. Regular practice, good sleep, and physical fitness all improve reaction time. Caffeine has a short-term positive effect for most people.
- Why does my reaction time vary between rounds?
- Reaction time varies naturally due to attention, anticipation, and fatigue. The average across 5 rounds is more reliable than any single round.
- Is my data sent anywhere?
- No. Everything runs in your browser. No data is sent to a server.