A fun, easy way to keep track of your due date is Pregnancy Birth and Beyond’s interactive due date calculator. Please enter the first date of your last period, along with your normal menstrual cycle length. The due date calculator will then estimate your baby’s due date.

Due Date Calculator

The average pregnancy lasts approximately 280 days — 40 weeks — counting from the first day of the last menstrual period. Your due date is what midwives or doctors once referred to as the estimated date of confinement (EDC). This is because in the old days, women were actually ‘confined’ to the hospital around the time the baby was due. Thankfully a lot has changed since then! The due date can be calculated by starting with the date of the first day of your last menstrual period (LMP).