Ovulation and Due Date Calculator << Mom-to-be Tools << Healthy Pregnancy << womenshealth.gov

Ovulation and Due Date Calculator

Use this calculator to find out when you are most likely to become pregnant and to estimate your due date should conception occur.

Step One

Enter the first day of your last menstrual period below:

Month:
Day:
Year:

Step Two

Enter the number of days in your menstrual cycle:

To determine the number of days in your cycle, count the days beginning with the first day of your last menstrual period (first day of bleeding) up to and including the day before your next period.

Content last updated March 5, 2009.

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