Estimated Due Date (EDD) Calculator Calculate your estimated due date and track pregnancy milestones based on your last menstrual period (LMP) or conception date. This calculator provides comprehensive pregnancy timeline information for expectant parents and healthcare providers. Calculate your due date with our medically-reviewed LMP calculator. Track pregnancy week by week, get expert guidance, and access trusted tools for every stage. Our Pregnancy Due Date Calculator is designed to provide you with an estimated due date by using specific inputs like your Last Menstrual Period (LMP) or, Conception Date. This calculator helps you estimate your date of delivery ("due date") based on the timing of your last menstrual period. Gestational age estimates how far along you are in your pregnancy.