Reverse Due Date Calendar. A reverse due date calculator or a reverse conception date calculator is a tool by which a pregnant woman can calculate the approximate period of conception if she knows the. Instead of predicting your baby’s due date based on your last menstrual period, it helps you figure out when conception likely occurred, based on your estimated due date.

This conception calculator allows you to calculate the exact day of conception based on the weeks’ gestation and delivery date. Our conception calculator, also known as a reverse due date calculator, is the answer to the question when did i conceive? as it estimates when your pregnancy was conceived.