Fitness & Health Calculators
Client-Side / Zero Latency
Pregnancy Due Date & Trimester Calculator
Estimate estimated delivery date (EDD), current gestational age in weeks and days, and trimester milestones using Naegele's rule.
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Pregnancy Due Date & Trimester Milestone Calculator
Discover your estimated due date, fetal gestational age, and developmental milestones based on standard clinical obstetric formulas.
Key Features:
- Naegele's rule standard medical calculation.
- First, Second, and Third trimester start dates.
- Weekly fetal progress timeline.
How to Use:
- Select calculation method (Last Menstrual Period or Conception Date).
- Enter relevant date.
- View estimated due date, current pregnancy week, and trimester schedule.
How Naegele's Rule Calculates Due Dates
Naegele's rule calculates the expected delivery date by adding 1 year, subtracting 3 months, and adding 7 days to the first day of the last menstrual period (LMP).
Frequently Asked Questions:
Only about 4% to 5% of babies arrive on their exact calculated due date; most arrive within 2 weeks before or after.