Due Date Calculator

The estimated due date is calculated using Naegele's Rule, which adds 280 days (40 weeks) to the first day of the last menstrual period (LMP). This method is the global standard used by obstetricians worldwide. Pregnancy spans approximately 40 weeks, divided into three trimesters: first (up to 13 weeks), second (14-27 weeks), and third (28 weeks onward). This tool displays not only the due date but also your current pregnancy week (weeks + days format), trimester, and days remaining until the due date. A visual progress bar shows how far along the pregnancy has progressed. Please note that this is an estimate based on LMP — for a precise due date, consult your obstetrician with ultrasound confirmation.