Pregnancy tools
Pregnancy calculators
From your first cycle through your baby's first months — a calm set of calculators built around the formulas your obstetrician actually uses. Each one explains the math and the limits.
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Ovulation Calculator
Find your fertile window and predict your most fertile days.
Pregnancy Weight Gain
How much weight gain is healthy in each trimester for your starting BMI.
Contraction Timer
Time contractions and apply the 5-1-1 rule for when to head to the hospital.
Kick Counter
Track fetal movements per session and see your trend over time.
Pregnancy Test Timing
When can you reliably take a home pregnancy test? Calculate from your LMP.
Fertility Window
Your six-day fertile window plus peak ovulation day.
Fetal Weight (Hadlock)
Estimate fetal weight from ultrasound measurements with the Hadlock formula.
Pregnancy BMI Calculator
Your starting BMI and recommended weight-gain range for pregnancy.
Baby Growth Percentile
WHO percentile for baby weight, height, and head circumference.
Newborn Sleep Schedule
Recommended sleep windows by your baby's age in weeks.