Reaction Time Test
Utility ToolsTest how fast you react in milliseconds
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Average human reaction time is about 250 ms. Under 200 ms is excellent. Screen and touch delay adds a little.
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History
All history →Reaction Time Test — at a glance
Measure how quickly you react to a visual signal.
Wait for green
Test
231 ms
How to use it — step by step
Nothing. Tap when the box turns green.
1
Tap to start
The box turns red.
2
Wait for green
Do not tap early.
3
Tap at once
Your time in milliseconds appears.
Pro tips
Small things that make the result better.
✦Rest your finger above the button.
✦Average is about 250 ms.
✦Do 5 attempts for a reliable average.
Quick facts
msprecise timing
Averageof 10 tries
Besttime kept
Freeno signup
Frequently Asked Questions
What is a good time?+
Under 200 ms is excellent, 200–300 ms is normal.
Why do I get "too soon"?+
You tapped before the box turned green.
Does my screen affect it?+
Slightly. Touch screens and displays add a few milliseconds of delay.
Is my data safe?+
Yes. Everything runs inside your own browser. Your text, files and images are never uploaded to any server.
Is this tool really free?+
Yes — completely free, no signup, no watermark and no usage limit.
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