OB Wheel WEB is a free app to calculate the date of pregnancy. OB Wheel WEB is not intended for medical use, and the results should not be used for medical decisions. This application is intended to help you determine the day of your pregnancy. The results provided by OB Wheel WEB are not a replacement for clinical judgment of your doctor.

OB Wheel WEB calculates the day of pregnancy from the last menstrual period (LMP) and the date of conception. The app uses the date of conception as the end date of the period. The results are provided in weeks, days, and months.

If you are pregnant, you should use OB Wheel WEB to calculate the expected date of delivery. This is an important calculation to make because it will help you plan for and prepare for the birth of your child.