Reaction Time
Test your visual reflexes by clicking as fast as possible when the screen changes color.
About Reaction Time
The Reaction Time Test measures how quickly you can respond to a visual stimulus. Your reaction time is the number of milliseconds between when you see the green screen and when you click. This test is used by gamers, athletes, and researchers to measure and improve visual reflexes.
How to play
Follow the same short sequence each time so the score stays easy to understand.
- 01Wait for the red screen to turn green
- 02Click or tap as soon as you see the green color
- 03Don't click early - wait for the color change
- 04Take multiple attempts and track your best time
- 05Your reaction time is measured in milliseconds (ms)
Benefits
- Measure your baseline reaction speed
- Track improvement over training sessions
- Compare your result with illustrative reference ranges
- Train visual response for gaming and sports
- Monitor cognitive alertness and fatigue
Tips for better scores
- Get enough sleep before testing - fatigue slows reactions
- Keep sleep, time of day, and device setup consistent when comparing attempts
- Use a gaming mouse for lower input latency
- Practice consistently rather than in long sessions
- Track variables like sleep and caffeine alongside scores
Related games
Learn more
Go deeper on the skill, then return when you are ready for another clean baseline.
Frequently asked questions
What is a good reaction time?+
Many simple visual reaction tests land around 200–250 milliseconds, but results depend on the device, display, input method, and protocol. Use your own repeated average as the most useful baseline.
Can I improve my reaction time?+
You can usually improve performance on a practiced reaction task. Sleep, attention, device setup, and consistent testing conditions also affect the result.
Why is my reaction time different each time?+
Variation is normal. Factors like focus, fatigue, time of day, and even slight hand positioning affect each attempt. Track your average over multiple tests for accuracy.
Does monitor refresh rate affect reaction time?+
Display refresh rate and input latency can affect a browser result. Keep your setup consistent if you want to compare sessions; this is not a calibrated laboratory measurement.