Sleep Calculator
Find your ideal bedtime or wake time based on 90-minute sleep cycles. Wake up refreshed by timing your sleep to end at the close of a cycle.
BodyStd · https://bodystd.com · 7/30/2026
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Sleep Calculator
Find your ideal bedtime or wake time based on 90-minute sleep cycles. Wake up refreshed by timing your sleep to end at the close of a cycle.
Result
Enter a time to see results
Authority Source
Recommendations follow the American Academy of Sleep Medicine and CDC sleep guidelines: CDC sleep basics.
Frequently Asked Questions
The American Academy of Sleep Medicine recommends 7–9 hours for adults aged 18–64 and 7–8 hours for adults 65+. This calculator targets the 7.5-hour (5-cycle) and 9-hour (6-cycle) marks.
Disclaimer: This calculator is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about a medical condition.