Pregnancy Due Date Calculator
Calculate your pregnancy due date and track your baby's development week by week with accurate milestone predictions
Pregnancy Calculator
Ready to Calculate
Enter your pregnancy details to calculate your due date and track your baby's development.
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How to Use the Pregnancy Due Date Calculator
Choose Calculation Method
Select your preferred method: Last Menstrual Period (most common), Conception Date (if known exactly), or Ultrasound Dating (most accurate).
Enter Date Information
Input the first day of your last menstrual period, conception date, or ultrasound date with gestational age measurements.
Review Due Date Results
Get your calculated due date, current pregnancy week, trimester information, and estimated conception date.
Track Development Milestones
Monitor your baby's weekly development, size comparisons, and important pregnancy milestones throughout your journey.
Save Calculation History
Save and compare previous calculations to track pregnancy progress and share with your healthcare provider.
Share & Export Data
Share results with family or doctor, export calculation history as CSV for medical record keeping.
Expert Pregnancy Tips
Only 5% of babies are born exactly on their due date - 90% are born within 2 weeks before/after the calculated date
First trimester ultrasounds have the highest accuracy (3-5 days margin) compared to later ultrasounds
Track fetal movements from weeks 16-25: first-time mothers feel movements later than experienced mothers
Prenatal visits schedule: every 4 weeks (months 1-6), every 2 weeks (months 7-8), weekly (month 9)
Take folic acid 400mcg from before conception through first trimester to prevent neural tube defects
Avoid alcohol completely, limit caffeine <200mg/day (1-2 cups coffee), no smoking during pregnancy
Healthy weight gain: normal BMI gain 25-35lbs, underweight gain 28-40lbs, overweight gain 15-25lbs
Warning signs requiring immediate medical attention: bleeding, severe abdominal pain, fever >100.4°F, sudden decrease in fetal movement