Track your pregnancy: from your last menstrual period, due date, or conception date, see your current gestational age, trimester, due date, and key milestones.
How to use Pregnancy Calculator
Pick which date you know (LMP, due date, or conception).
Enter that date.
See your current week, trimester, and milestones.
Frequently asked questions
How is the due date estimated?
By Naegele’s rule — 280 days (40 weeks) from the last menstrual period, assuming a 28-day cycle. It is an estimate, not medical advice.