Most online calculators and healthcare providers use one of several standard formulas to estimate your delivery date. These methods primarily rely on when your pregnancy began, though the "start date" can be defined in different ways. Calculating a Due Date | Johns Hopkins Medicine
Determining your estimated due date (EDD) is one of the first steps in preparing for parenthood. While it marks a single day on the calendar, a is actually a sophisticated tool that uses biological benchmarks to help you and your medical team monitor your baby's growth and plan critical healthcare milestones. How a Due Date Calculator Works due date calculator