Calculate pregnancy week and due date using Naegele's rule. Enter the first day of your last menstrual period (LMP) to get current gestational age, estimated due date, and fetal development milestones.
Pregnancy is calculated from the first day of your last menstrual period, lasting about 40 weeks (280 days). Enter your LMP date to find your current week and estimated due date. Always consult your doctor for medical advice.