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Chronotype Calculator

Find your sleep chronotype

🌙Chronotype Calculator

Chronotype describes an individual's natural preference for morning or evening activity, driven by genetic factors (particularly the PER3 gene). About 15% of people are extreme "larks" (morning types), 15% extreme "owls" (evening types), with 70% in between.

Fun Fact

Social jet lag — the discrepancy between biological and social clocks — affects over 70% of working adults. Every hour of social jet lag correlates with a 33% higher chance of being overweight.

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