Pregnancy Due Date & Trimester Milestone Calculator
Clinical pregnancy due date calculator based on Naegele's rule (40 weeks / 280 days). Calculates estimated date of delivery (EDD), current gestational week and day, trimester progress, and ultrasound milestones.
First Day of Last Period
Standard clinical dating assumes 40 weeks (280 days) from the onset of your last menstrual cycle (Naegele's rule).
Key Pregnancy Milestones
Egg fertilization and implantation.
Cardiac activity visible on ultrasound.
Major organs formed; miscarriage risk drops significantly.
Comprehensive anomaly scan & gender discovery.
Baby reaches potential medical survival milestone outside the womb.
Rapid brain development and lung maturation.
Baby considered full-term ready with mature lungs.
The big arrival day (40 completed weeks).
How to Use Pregnancy Due Date & Trimester Milestone Calculator
Select Calculation Basis
Choose between the first day of your Last Menstrual Period (LMP) or Conception Date.
Set Date & Cycle Length
Pick the calendar date and adjust cycle duration if different from the 28-day standard.
Explore Timeline
View your estimated delivery date, trimester progress bar, and major development scan dates.
Frequently Asked Questions
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