UMMS: Pregnancy Due Date Calculator
UMMS Health Calculators

Find out when your baby is due.

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Planning is an important part of your pregnancy. Use our Pregnancy Due Date Calculator to find out when your baby is due, so that you can plan for the day when your baby will arrive.

Healthcare professionals use the number of weeks since your last menstrual period to describe how far along you are in your pregnancy. This calculation is for an average pregnancy. Your pregnancy may be longer or shorter.

This test should be only used as a guideline.

What was the date of the first day of your last menstrual period?




The information on this Web site is provided as a public service by the University of Maryland Medical System, a regional health care delivery system that includes an academic medical center (the University of Maryland Medical Center in downtown Baltimore) as well as five community and specialty hospitals and outpatient sites throughout Baltimore and central Maryland. This information is not intended to be a substitute for individual medical advice in diagnosing or treating a health problem. Please consult with your health care provider about your health care concerns. If you would like to make an appointment with a University of Maryland physician, please call 1-800-492-5538.