⚡ Reaction Time Test
How fast are your reflexes? Pick a mode, complete 5 rounds, and see how you rank against your age group — no signup required.
Round Results
| Age | Avg (ms) |
|---|---|
| 18–24 | 200 |
| 25–34 | 215 |
| 35–44 | 230 |
| 45–54 | 250 |
| 55–64 | 275 |
| 65+ | 320 |
What Is Reaction Time and Why Does It Matter?
Reaction time is the interval between a stimulus and your response to it. Simple reaction time — responding to a single signal with a single action — averages 200–250 ms for healthy adults. This time includes the neural delay for your eyes to send signals to your brain, your brain to process the signal, and your muscles to execute the movement.
Reaction speed matters in sports (a batter has roughly 400 ms to decide whether to swing at a 90 mph fastball), driving (faster reactions reduce stopping distance by several metres), and many workplace tasks requiring quick decision-making. This test measures your simple visual and keyboard reaction time with a consistent protocol across 5 rounds to give you a reliable average.
How Our Three Reaction Test Modes Work
The Visual mode tests your click reaction to a colour change — the box turns green and you click as fast as possible. The Keyboard mode requires pressing Space when a signal text appears, testing the slightly different neural pathway used for keyboard input. Double-tap mode adds a second action requirement, testing both initial reaction speed and rapid motor sequencing.
Each mode uses a random delay of 1.5–4 seconds before the signal appears. This prevents you from timing your click in advance (anticipation cheating). If you click before the signal appears, the test records a false start and you'll need to redo that round — just like an Olympic sprint false-start rule.
Can You Train Your Reaction Speed?
Research shows simple reaction time is trainable, but the gains are modest — typically 10–20 ms improvement with dedicated practice. The bigger gains come from reducing variability: consistent reaction times matter more in sports and driving than single-trial bests. Video game players, especially in action genres, show consistently faster and more reliable reaction times than non-players.
Sleep has the largest short-term impact on reaction time. A sleep-deprived person can react 50–100 ms slower than when well-rested. Caffeine provides a modest 10–20 ms improvement. Alcohol significantly impairs reaction time even at low blood-alcohol concentrations, which is why even one or two drinks measurably increases braking distance when driving.