Reaction Time Test
Click as soon as the box turns green to measure your reaction time in milliseconds.
- Last
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- Average (0/5)
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- Fastest this round
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- Your best average
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How to use it
- 1
Click to start
The box turns red — wait, and don't click yet.
- 2
Click on green
As soon as it turns green, click (or press Space) as fast as you can.
- 3
Five tries
After five tries you get your average and a rating.
Perfect for every need
Gaming
Check your reflexes before ranked matches or track improvement.
- FPS warm-up
- Esports practice
Alertness check
See how tiredness, caffeine, or time of day affects your reactions.
- Morning vs night
- After coffee
- Sleep experiments
Classroom & fun
A quick science demo or a challenge between friends.
- Science class
- Friendly contest
Frequently asked questions
What is a good reaction time?
For a mouse-click test like this, most people average between 200 and 300 milliseconds, with around 250–275 ms typical. Under 200 ms is exceptional. Touch screens and some monitors add a little delay.
Why is my score slower on some devices?
Your device adds latency: display refresh rate, input lag, and Bluetooth mice or keyboards can each add several to tens of milliseconds. Compare scores on the same device for a fair result.
Can I improve my reaction time?
Somewhat. Good sleep, being warmed up, and practice with fast-paced games can help, while fatigue, alcohol and distraction slow you down. Most of the gain comes from consistency rather than raw speed.
What happens if I click too early?
Clicking while the box is red shows "Too soon" and that attempt doesn't count. The wait before green is random (1.5–4.5 seconds) so you can't anticipate it.