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Sleep Cycle Calculator
Plan your sleep around natural 90-minute sleep cycles.
Use the Sleep Cycle Calculator
Sleep Cycle Calculator
Wake up between cycles to feel refreshed
:
Selected: 10:00 PM
3 cycles (4.5h)5 (7.5h)7 cycles (10.5h)
0 min30 min60 min
How This Tool Works
The Sleep Cycle Calculator uses evidence-based sleep science to provide you with personalized recommendations. Simply enter your information above and get instant results tailored to your situation.
This tool is designed to give you a clear starting point for understanding your sleep patterns. For persistent sleep issues, we recommend consulting with a qualified healthcare provider who can offer personalized medical guidance.
Frequently Asked Questions
How accurate is this tool?
This tool uses clinically-informed algorithms and peer-reviewed sleep science research. While it provides helpful estimates and guidance, individual results may vary based on personal health factors. Always consult a professional for medical decisions.
Is my data stored?
No. All calculations are done entirely in your browser. We do not store, collect, or transmit any personal health data you enter into this tool.
When should I see a doctor instead?
If your symptoms persist for more than 2-4 weeks, significantly impact daily functioning, or include difficulty breathing during sleep, consult a healthcare provider. This tool supplements but does not replace professional medical evaluation.