Lmp Due Date Calendar. This free due date calculator estimates the due date based on the menstrual cycle, ultrasound, conception date, or ivf transfer date. This pregnancy due date calculator will give you a rough idea of when your baby should be born.

Gestational age estimates how far along you are in your pregnancy. Your due date is calculated based on the first day of your last menstrual period (lmp) or, if known, your conception date.