About MySleepCycles.com
MySleepCycles.com was created by Health Hub Academy with a single mission: to make evidence-based sleep science accessible to everyone, completely free.
We believe that understanding your sleep cycles is one of the most impactful things you can do for your health, productivity and wellbeing — and that this knowledge should not sit behind a paywall or require a medical appointment.
The Science Behind Our Tools
Every calculator on MySleepCycles.com is built on peer-reviewed sleep research. Our 90-minute cycle model is based on the foundational work of sleep researcher Nathaniel Kleitman (1953), validated by decades of subsequent research. Sleep duration recommendations align with NHS UK guidelines and the American Academy of Sleep Medicine.
- — Hirshkowitz et al. (2015). National Sleep Foundation sleep duration recommendations. Sleep Health.
- — Kleitman, N. (1953). Sleep and Wakefulness. University of Chicago Press.
- — NHS UK — Sleep and Tiredness guidance.
- — American Academy of Sleep Medicine — Adult Sleep Guidelines 2015.
About Health Hub Academy
MySleepCycles.com is part of the Health Hub Academy family — a health education platform committed to producing accurate, accessible health information for UK and international audiences.
Visit Health Hub Academy →No data collection
All calculations happen entirely in your browser
Cookieless analytics
We use Rybit, which tracks no personal data whatsoever
Educational only
We are not a medical service. Always consult your GP for health concerns.
Medical Disclaimer
The information and tools on MySleepCycles.com are for educational and informational purposes only. They do not constitute medical advice, diagnosis or treatment. Our calculators provide estimates based on population-level sleep science and should not replace advice from a qualified healthcare professional. If you experience persistent sleep problems, excessive daytime fatigue, or symptoms that concern you, please contact your GP (UK) or primary care physician (US).