Sleep Calculator
Plan bedtime, wake time, or sleep duration — basic and advanced modes
Methodology
- Sleep cycles ~90 min — indicative, not medical advice
How does the sleep calculator work?
The tool has two modes. In basic mode you pick one of three input goals: wake at a time (suggests bedtimes), bed at a time(suggests wake times), or how long I will sleep given set bed and wake times. In advanced mode you can add recovery, shift work, a short nap, and stress level, which adjust the suggestions based on those settings.
Results are guidelines — individual needs vary. This tool does not replace medical advice. Save results to your profile to track trends over time. Age-group ranges shown in the UI are general orientation, not personalized medical advice.
After Calculate you see the age-group range, status versus that range, and one or more suggestions with bedtime, wake time, and duration. Advanced notes reflect the extra options you enabled.
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Frequently Asked Questions
How much sleep do I need?
It depends on age and lifestyle. The calculator shows typical ranges — use them as a starting point, not a fixed rule.