Circadian Rhythm Calculator
Determine peak alertness, cortisol spikes, and melatonin windows based on your sleep-wake schedule.
Input Parameters
Enter details for calculation.
Peak Focus Window
Expert Tip
Melatonin release begins roughly 14 hours after waking in daylight. Light exposure early in the morning anchors your circadian clock.
Calculation Methodology & Details
Formula
Maps biological circadian milestones relative to your wake-up time.
Important Disclaimer
The calculations provided are for educational and general informational purposes only. They do not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider.
How Circadian Milestones are Calculated
Follow these steps to use this calculator:
Enter Wake Time
Input the time you normally wake up.
View Circadian Schedule
Read peak focus, afternoon dip, and sleep window times.
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ℹ️ About this Calculation
This sleep medicine calculator evaluates sleep architecture, circadian rhythm alignment, daytime sleepiness risk scores, and sleep apnea severity (AHI / STOP-BANG) based on clinical somnology protocols.
Variable Glossary
Sleep Data & Symptoms
Bedtime, wake time, total sleep duration, nocturnal awakenings, or questionnaire symptom scores.
Sleep Metrics
Sleep efficiency percentage, AHI severity tier, REM cycle counts, or sleep debt accumulation.
How to Calculate Step-by-Step
Step 1
Input your sleep times, duration, or answer the clinical assessment questions.
Step 2
Adjust target sleep goals or age-appropriate sleep recommendations.
Step 3
View optimal wake/sleep times, cycle counts, or clinical sleep disorder screening risk.