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Home Knowledge Center Wellness Library Interactive Tool: What Is Your Due Date?

Interactive Tool: What Is Your Due Date?

What does this tool help you learn?

This tool calculates your pregnancy due date, an estimate of when you are likely to deliver your baby.

To find your due date, the calculator takes the first day of your last menstrual period (LMP) and adds 40 weeks. If you are planning a pregnancy, you can use this calculator to plan the birth for a certain month or season.

Katz VL (2008). Prenatal care. In RS Gibbs et al., eds., "Danforth's Obstetrics and Gynecology," 10th ed., p. 4. Philadelphia: Lippincott Williams and Wilkins.

What does your due date tell you?

What does your due date tell you?

Your due date is an estimate of when you will likely have your baby, based on the normal length of a full-term pregnancy. Most babies are born within 14 days of their due date.

 What's next?

What's next?

Your health professional will also measure the size of your uterus and use ultrasound testing to determine your due date.

Explore more

  • Pregnancy

This information does not replace the advice of a doctor. Healthwise, Incorporated, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Learn how we develop our content.

To learn more about Healthwise, visit Healthwise.org.

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