Reaction Time Test
A 10-round in-browser test of simple reaction speed and consistency.
Tool 15 · 1 min · Educational tool
Round 1 of 10. Use the same device each time for fair comparison.
How this works
- Model
- Simple reaction time (v1.0)
- Source
- Method after Der G, Deary IJ. Age and sex differences in reaction time in adulthood (UK Health and Lifestyle Survey). Psychol Aging 2006. — reference
- Intended use
- Track your own reaction speed over time.
- Population
- Adults
- Limitations
- Device, screen and browser latency add 20–80 ms.
- Compare with your own previous results rather than other people.
- Status
- Educational tool · methodology checked 3 November 2026
Educational self-assessment — not a diagnostic test. Results are based on published research and population data and can't account for everything about you. They are not a diagnosis and don't replace advice from a healthcare professional. If you're worried about your health, speak to your GP or call NHS 111.