Helpful estimates for your cycle, sleep, and daily health
Use the information you already have to plan ahead and understand everyday patterns. Every result is an educational estimate, not a diagnosis or a substitute for care.
Cycle estimates
Use dates and patterns you already know to explore your cycle. These calendar estimates cannot confirm ovulation or prevent pregnancy.
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Ovulation Calculator
Estimate an ovulation day and fertile window from the first day of your last period and your usual cycle length.
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Menstrual Cycle Calculator
Map an estimated cycle timeline, including the next period and likely ovulation window.
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Period Calculator
Estimate upcoming period dates from your most recent period and usual cycle pattern.
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Period Regularity and Cycle Variability Calculator
Compare recent period start dates to describe your average cycle length and how much it varies.
Sleep and recovery
Compare the timing of workday and free-day sleep to see how far your schedules shift.
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Social Jetlag Calculator
Compare the midpoint of your workday and free-day sleep to describe the timing shift between them.
Nutrition foundations
Turn population nutrition references into a simple, gradual planning target.
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Daily Fibre Intake Calculator
Compare your estimated intake with a life-stage reference and create a gradual fibre ramp plan.
Pregnancy timing
Explore common timing questions around testing and pregnancy dating. Your care team remains the source for clinical decisions.
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When to Take a Pregnancy Test Calculator
Estimate when a home pregnancy test may be most useful based on your expected period or last menstrual period.
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Pregnancy Due Date Calculator
Estimate a due date and current gestational age from the first day of your last menstrual period.
A clear starting point, not a diagnosis
- Calculated in your browser
Calculator entries are used to create your result in the current browser session and are not saved in browser storage by this tool.
- Clear about uncertainty
Body timing can vary. A result is a transparent starting point for a conversation, not a confirmation of what is happening in your body.
- Sources you can inspect
Each calculator links to the health sources used for its educational context and is held for clinical and legal review before search indexing.