Pregnancy Calculator by Conception Date
January 19, 2019
Your estimated due date is calculated by adding 280 days (40 weeks) to the first day of your last menstruation (assuming a 28 day cycle). Remember that your due date is an estimate. Every pregnancy is unique and your baby will come when it's ready. Conception day is the day when your baby is conceived. the date of conception is calculated from the pregnancy due date.