About Reaction Time
Reaction time tests are one of the most popular online brain challenges. Most people react to a visual signal in around 200 to 300 milliseconds.
Reaction Time at a glance
| Genre | Brain game |
|---|---|
| Price | Free, no download or sign-up |
| Controls | Tap |
| Typical game length | 1 minute |
| Lives | None |
| Works on | Phones, tablets and computers, in any modern browser |
| Daily challenge | Yes, the same puzzle for everyone each day |
How to play Reaction Time
- Tap to start. The box turns red.
- Wait for green. Tapping early counts as a missed try.
- Tap on green. Your time is shown in milliseconds.
Rules
- Five tries per test.
Levels and difficulty
One five-try test.
Scoring
Faster times score more. Daily challenge scores can be shared with friends.
Tips and strategy for Reaction Time
- Rest your finger right on the screen.
- Don't guess: early taps waste a try.
How we built and tested Reaction Time
Times are measured with the browser's high-resolution timer. Results can vary slightly between devices and screens.
Frequently asked questions
What is a good reaction time?
Around 250 ms is typical; under 200 ms is very fast.