Use any online reaction test five times and average the results. This tool compares your milliseconds with the expectation for your age.
Your visual report appears here
Fill in the form and press Calculate. You will get your number, an interpretation chip, and a personalized chart pack drawn instantly in your browser.
- Risk spectrum with your position marked
- Reference ranges from the original publication
- Shareable link, nothing stored
Scientific references
What slows with age
Simple reaction time grows by roughly 1.5 milliseconds per year after the twenties, reflecting nerve conduction and processing changes. The slope is gentle until the sixties, then steepens.
Understanding your result
A negative number means you react faster than the age expectation, near zero means typical, and more than thirty milliseconds slower suggests fatigue, distraction or genuine slowing worth tracking.
What confounds the test
- Caffeine, sleep debt and stress swing results by tens of milliseconds
- Laptop touchpads add lag compared with a mouse
- Time of day matters, late afternoon is usually fastest
Keeping it sharp
Sleep, aerobic exercise and activities demanding quick decisions, from table tennis to fast video games, all preserve processing speed.