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. What Is an LMP Due Date Calculator? An LMP Due Date Calculator is a digital tool that estimates a woman’s Estimated Due Date (EDD) based on the first day of her Last Menstrual Period (LMP). It assumes a regular 28-day menstrual cycle and calculates the due date by adding 280 days (or 40 weeks) to the LMP. While ultrasound and ovulation tracking can also estimate due dates, LMP-based calculation is the most commonly used method, especially in the early stages of pregnancy. What Exactly is an EDD Calculator? An EDD Calculator, also known as a Due Date Calculator, is a tool that helps estimate when your baby will make their grand entrance into the world. It’s based on a few key factors, such as the first day of your last menstrual period (LMP) or the date of conception. Calculate your estimated due date (EDD) and gestational age based on various methods, such as conception date, LMP, ultrasound, or embryo transfer. Learn about the accuracy and limitations of each method and the factors that affect the date of delivery.
