Pregnancy Calendar & Due Date Calculator - WellCal

Pregnancy Calendar & Due Date Calculator




Leave at 28 days if unsure.

Plan Your Pregnancy Journey with Confidence

The Pregnancy Calendar & Due Date Calculator is a comprehensive prenatal planning tool that calculates your estimated delivery date while providing a week-by-week pregnancy timeline. This essential calculator helps expecting parents track fetal development, schedule prenatal appointments, and prepare for their baby’s arrival with personalized milestone tracking.

How Your Pregnancy Calendar & Due Date Gets Calculated

Our pregnancy calendar & due date calculator uses the standard 280-day gestation period from your last menstrual period (LMP) or conception date. Enter your LMP’s first day or embryo transfer date for IVF pregnancies, and instantly receive your estimated due date plus a detailed pregnancy calendar. The calculation follows Naegele’s Rule, adding 280 days to your LMP, accounting for typical 40-week pregnancies.

Your personalized pregnancy calendar highlights crucial developmental milestones each week. Track when your baby’s heart starts beating, when you’ll feel first movements, and optimal timing for important tests. This weekly breakdown transforms an overwhelming nine months into manageable, exciting milestones you can anticipate and celebrate.

Navigate Each Trimester with Expert Guidance

The pregnancy calendar & due date calculator becomes your trusted companion throughout pregnancy. Beyond calculating your due date, it provides trimester-specific guidance on symptoms, necessary tests, and preparation tasks. Knowing your exact gestational age helps healthcare providers monitor development and schedule crucial screenings at optimal times.

Regular calendar consultation keeps you informed about your baby’s size, organ development, and movement patterns. Partners appreciate understanding what’s happening each week, fostering deeper connection with the pregnancy journey. This knowledge reduces anxiety and helps you prepare emotionally and practically for parenthood.

Frequently Asked Questions

Due date calculators are approximately 95% accurate for regular cycles, though only 5% of babies arrive on their exact due date; most deliver within two weeks before or after.

Yes, ultrasounds during the first trimester may adjust your due date by a week or two if baby’s measurements differ from LMP calculations.

Early ultrasound measurements can establish gestational age and due date when LMP is unknown, typically most accurate between 8-13 weeks of pregnancy.

Pregnancy weeks count from the first day of your last menstrual period, not conception, making you technically “pregnant” two weeks before conception occurs.

IVF due dates are calculated from embryo transfer date plus 38 weeks (for day-5 blastocyst) or retrieval date plus 266 days, providing more precise dating.

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