Due Date Calculator
Calculates the estimated due date based on the last menstrual period, estimated conception/ovulation date, or pregnancy week.
Source / method note
This calculation is based on the assumption of 280 days from the last menstrual period and 266 days from the estimated conception date. In pregnancy week mode, the remaining time is calculated over 40 weeks.
Legal / official rate note
This tool is not intended for medical tracking, diagnosis, or treatment. The opinion of an obstetrician should be the basis for pregnancy and due date.
