Circadian Rhythm Calculator
Map a simple daily schedule from your usual wake time.
Your details
Your result
Enter your details and calculate.
Results are educational estimates, not medical advice. Individual needs can vary.
Your body clock
The circadian system influences alertness, hormone timing, digestion, and sleep. Morning light and a regular wake time are strong daily cues.
Reset gradually
Move sleep times by 15–30 minutes every few days rather than making abrupt shifts.
How to use this result
Use the estimate as a practical starting point, then track how you feel and adjust gradually. For medical conditions, pregnancy, medication use, or major training changes, consult a qualified health professional.