Pregnancy and Baby: Due date calculator

Pregnancy & Baby Index: Pregnancy - Tools and Planners: Calendars: Due date calculator

Due date calculator

When is your baby's due date, and when are you most fertile?

Do you want to know when your baby will arrive? Or when conception occurred? Enter the date of the first day of your last menstrual period (LMP), cycle length and your luteal phase length (if known), and we will do the calculation for you! And if you're confused about "age since conception," LMP and due dates? Get an explanation here.

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Fill in your information here

Last menstrual period (LMP):	(MM/DD/YYYY; example: 05/22/1983)
Cycle length (avg):	(22 to 45)
Luteal phase length (avg):	(9 to 16)

Your results:

Estimated date of conception:
Estimated due date:
Baby's estimated age now:

Now that you know when you're due, come join in the conversation on your due date message board, or create a week-by-week pregnancy timeline.

Be sure to keep in mind that any due date is only an estimate -- and only about 5% of babies actually arrive on the date they're "due." Your caregiver will typically assign your due date based upon a 28-day cycle. We also have information to help unravel the mystery of pregnancy due dates.

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