Health
Pregnancy Due Date Calculator
Calculate your estimated due date based on your last period
FAQs
How is a due date calculated?
Most healthcare providers use the first day of your last menstrual period (LMP) and add 280 days (40 weeks) to estimate the due date. This is known as Naegele's rule.
How accurate is the due date?
An estimated due date is just that—an estimate. Only about 4% of babies are born on their actual due date. Most are born between 37 and 42 weeks.
What is my conception date?
Conception typically occurs about two weeks after the first day of your last period, assuming a 28-day cycle.