Speed Test
Reaction Time Test
Click the moment the screen turns green. We average five attempts for your score.
Reaction Time Test
When the red box turns green, click as quickly as you can.
What is Reaction Time?
- Definition
- Simple visual reaction time (SRT) is the elapsed time between a visual stimulus appearing on screen and your motor response completing (e.g., clicking a mouse).
- Global Average
- The global average reaction time is approximately 250 to 280 milliseconds (ms) in laboratory conditions, or roughly 284ms on web-based platforms due to hardware latency.
It is the most fundamental benchmark of neural processing speed - Capturing the entire perceptual-motor chain from a photon hitting your retina to your finger registering a click. Franciscus Donders first measured it systematically in 1868.
SRT is distinct from more complex variants. Choice reaction time adds a stimulus-identification decision that costs ~100–150ms. Audio reaction time uses sound instead of light and is typically 30–50ms faster. This test isolates the pure detection-to-response interval.
The neural reaction chain
The theoretical minimum for genuine human reaction (not anticipation) is approximately 100–120ms - The combined minimum neural conduction time. Scores below 100ms are anticipation clicks. The remaining gap between the 120ms floor and your actual score represents variance in attentional readiness, arousal state, and motor preparation speed.
Reaction Time Score Distribution
The distribution is right-skewed: most scores cluster between 220–320ms, with a sharp lower tail (genuine fast responders) and a long upper tail (fatigue, mobile devices, and hardware lag). Trimmed means that exclude the slowest tail typically land in the 260s; the raw ~284ms web average is inflated by that upper tail.
Score percentile reference
| Percentile | Reaction time | Classification | Typical profile |
|---|---|---|---|
| Top 1% | <160ms | Exceptional | Professional esports, trained athletes |
| Top 10% | 160–210ms | Excellent | Competitive gamers, young adults well-rested |
| Top 25% | 210–250ms | Above average | Active adults on a good device |
| 50th (median) | 250–300ms | Average | Normal healthy adult range |
| Bottom 25% | 300–360ms | Below average | Fatigue, mobile device, or older age |
| Bottom 10% | >360ms | Slow | High hardware latency likely a factor |
Benchmarks based on published norms and large public datasets, trimmed to exclude likely anticipation clicks (<100ms) and extreme hardware lag (>800ms).
Visual vs audio vs tactile reaction time
Reaction time is not a single number - It varies by sensory modality. The auditory pathway to the motor cortex is shorter and has fewer synaptic relays than the visual pathway, making audio reaction time consistently faster. Tactile (touch) RT is faster still but rarely tested outside laboratory settings.
| Modality | Average RT | Why faster/slower |
|---|---|---|
| Tactile (touch) | ~155ms | Shortest pathway - Skin receptors directly activate spinal reflexes |
| Auditory (sound) | ~170–200ms | Cochlea → auditory cortex has ~4 synaptic relays vs ~6 for vision |
| Visual (this test) | ~250–280ms | Retina → V1 → motor cortex adds phototransduction delay (~20ms) |
Factors that affect your score
Reaction time fluctuates by 15–40ms across sessions in the same individual due to transient state factors - Arousal, hydration, fatigue, and caffeine. Understanding these lets you control for them when comparing across sessions, and explains why a "bad day" score is often 30–50ms slower than your true resting baseline.
Reaction time by age
Simple visual RT peaks in the early-to-mid 20s at approximately 218ms and slows by roughly 2–5ms per decade thereafter. This decline reflects reduced myelination efficiency and slower central processing. By age 65+, the average rises to ~310ms. Trained individuals maintain faster RT into their 40s and 50s compared to sedentary peers, but the underlying biological trend is not reversed.
Frequently Asked Questions (FAQ)
What is a good reaction time?
A good reaction time is anything below 250ms. A score between 250ms and 300ms is considered average for an adult. Anything below 200ms is excellent and typical of competitive gamers or professional athletes.
Why is my reaction time so slow?
Slow reaction times are often caused by hardware latency (using a wireless mouse, playing on a 60Hz monitor, or using a mobile phone). Biological factors like lack of sleep, dehydration, fatigue, or increasing age also significantly slow down your reaction speed.
Can you improve your reaction time?
Yes, you can improve your reaction time through practice, getting adequate sleep, staying hydrated, and doing aerobic exercise. Upgrading your hardware (e.g., using a 144Hz+ monitor and a wired gaming mouse) will also instantly improve your measured score.