The Pregnancy Calculator below is an estimation of weeks from reported last normal menstrual period (LMP) and does not constitute medical advice. A missed period does not necessarily mean that you are pregnant, and having a period does not mean you are not pregnant. Only an exam, pregnancy test, or ultrasound by a physician can confirm pregnancy and approximate length of pregnancy. The calculator should be used as a guide only and should not be relied upon for weeks of pregnancy, conception date, or due date.
Enter the date of the first day of your last menstrual period (LMP):