Pregnancy Due Date Calculator, How Many Weeks Am I Pregnant?

Pregnancy Due Date Calculator Form

The most common way to determine when your baby will be born is to calculate your date of birth based on your last menstrual period (LMP). To calculate how many weeks pregnant you are, this calculator looks at the first day of your last menstrual period (LMP) and compares it to today's date.

Please select the first day of your last menstrual period:

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Some women's cycles are not exactly 28 days. If your cycle is shorter or longer than 28 days, please adjust the number below.

Usual number of days in your period: