Utilz
Due Date Calculator
Estimate your baby's due date and track pregnancy milestones
Why Use This Tool?
- Quickly estimate your due date without a doctor visit.
- Track your pregnancy week and trimester at a glance.
- See upcoming milestones and important dates.
Formula
Naegele's Rule: Due Date = LMP + 280 days (40 weeks). If using conception date: Due Date = Conception + 266 days (38 weeks). This is the standard obstetric calculation used by healthcare providers.
How to Use
- Choose calculation method (LMP or conception date)
- Enter the date
- View your due date, current week, and trimester
- Track pregnancy milestones on the timeline
FAQ
How accurate is a due date calculator?
Due date calculators provide an estimate. Only about 5% of babies are born on their exact due date. Most births occur within 2 weeks before or after the estimated date.
What is the difference between LMP and conception date?
LMP (Last Menstrual Period) is the first day of your last period. Conception typically occurs about 14 days after LMP. The calculator adjusts accordingly based on which date you provide.
When should I see a doctor to confirm my due date?
Schedule your first prenatal visit between 6-8 weeks of pregnancy. An ultrasound during the first trimester provides the most accurate due date confirmation.