Due Date if I had last menstrual period on x
How to calculate the due date from your last menstrual period
The method to work out your due date from your LMP is to add 280 days to the first day of your last menstrual period. This will give you a rough guide of when your baby is due to be born.
Formula to calculate the due date from your last menstrual period
\[Due Date = Last Menstrual Period + 280 Days\]
Calculate the due date from your last menstrual period. The due date is the date you should have your next period.