Reverse Due Date Calculator
This extremely popular conception date calculator will calculate what date and day of the week your baby was conceived on based on your pregnancy due date. Also includes estimated dates for the missed menstrual period and for the range of days the pregnancy-causing "event" likely occurred within. Plus, you can also select any birth date -- meaning you can calculate conception dates for yourself and others.
Selected Data Record:
A Data Record is a set of calculator entries that are stored in your web browser's Local Storage. If a Data Record is currently selected in the "Data" tab, this line will list the name you gave to that data record. If no data record is selected, or you have no entries stored for this calculator, the line will display "None".
Get the App!
$0.99, iPhone or Android.