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Welcome to Sleep Calculator

Free · Private · Science-backed

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Not Medical Advice This tool provides general educational estimates based on typical sleep-cycle averages. It is not medical advice. If you have ongoing sleep problems, please consult a qualified doctor.

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Your Data Stays on Your Device Everything you enter — sleep times, diary entries, schedules — is saved only in your browser's local storage. Nothing is uploaded to any server. We never see your data.

🎯 6 Life Situations · Free

Sleep for Your Situation

The generic "8 hours" advice does not work when life has specific demands. Choose your situation and get a precise, science-based sleep plan built for it.

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Scenario calculations are educational estimates based on published sleep research. They are not medical advice. For serious sleep concerns or health conditions, consult a qualified professional.