Pregnancy Week Calculator
Calculate your pregnancy week and day based on your last menstrual period or estimated due date.
Source / method note
This calculation is based on the assumption of a standard 280-day pregnancy from the last menstrual period or estimated due date. The cycle length can be modified by the user.
Legal / official rate note
This tool does not replace medical diagnosis or monitoring. An obstetrician's opinion should be sought for pregnancy monitoring.
