Pregnancy Calculator

Due Date Calculator

Calculate your expected due date using our Due Date Calculator.


Calculate your expected due date by inserting the date of the first day of your last menstrual period in the Due Date Calculator.

How is your due date calculated

Your pregnancy is calculated from the first day of your last menstrual period rather than the date of conception. As women can varying in the length of their menstrual cycle, this can affect the due date. For example, a woman with a 35 days cycle will be due approximately 7 days later than a woman with a 28 day cycle.

You will be advised of your estimated due date at your first consultation.