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Health calculators
Pregnancy, fertility, and general health — the math behind important life decisions.
- Pregnancy due date calculatorCalculate your due date from last period or conception date. Naegele's rule.
- Ovulation calculatorFind your fertile window and estimated ovulation day from your cycle length.
- Sleep calculatorOptimal wake or bedtime aligned to 90-minute sleep cycle boundaries.
- Blood pressure guideAHA stage classification and pulse pressure from systolic/diastolic readings.
- Menstrual cycle calculatorNext period and cycle phase calendar from last period and cycle length.
- Fertility window calculatorPeak fertile days and ovulation window across the next 3 cycles.
- Intermittent fasting calculatorEating window and fast start/end times for 16:8, 18:6, and 5:2.
- Biological age calculatorEstimated biological age from lifestyle factors and vital signs.