👶 Pregnancy Due Date Calculator

Understanding Your Due Date

Your estimated due date (EDD) is calculated by adding 280 days (40 weeks) to the first day of your last menstrual period (LMP). This method, known as Naegele's rule, is the standard used by healthcare providers worldwide. Only about 5% of babies are born on their exact due date — most arrive within two weeks before or after.

Pregnancy Trimesters

• First Trimester (Weeks 1-12): Major organ development begins. Common symptoms include morning sickness and fatigue.
• Second Trimester (Weeks 13-27): Often called the "golden period" as many symptoms ease. Baby begins moving.
• Third Trimester (Weeks 28-40): Rapid growth and preparation for birth. Increased fatigue and discomfort.

Important: This calculator provides an estimate only. Always consult with your healthcare provider for personalized prenatal care and accurate dating.