Due Date Calculator

Calculate Your Due Date

Babies pick their birthdays! Use our due date calculator to help find the possible window.

One of the biggest obstacles to natural birth is misunderstanding your "due date." A due date does not mean there is only one safe day for your baby to be born. It is meant to establish a range of time that your baby is mature and safe to be born. Because modern obstetrics narrows this to a specific day, unnecessary interventions, like inducing labor, come into practice.

In a well-nourished, low risk pregnancy it is normal for your baby to be born between 37 and 42 weeks gestation*. Many natural events take place within your body during the last weeks of pregnancy to prepare you for labor. Allow time for the natural process to occur.

To find your range, enter the first day of your last menstrual period in the form below. Click on the calendar icon to select a date from a calendar.

  1.      (example: 10/1/2012)

We calculate your due date as:

Your safe range is:

Be sure to check out some of the other helpful articles and tools from MothersNaturally.com here—

*This estimate will not be accurate if you have irregular cycles, conceived while breastfeeding before your periods returned, or recently went off birth control pills before your regular cycle returned. If you have these circumstances, ask your midwife to help you figure out your due range.