Main content

    Health Information

    Interactive Tool: What Is Your Due Date?

    Interactive Tool: What Is Your Due Date?

    What does this tool help you learn?

    This interactive 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.

    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 women deliver within 14 days of their due date.

    What's next?

    Your health professional will also measure the size of your uterus and use ultrasound testing to determine your due date. For more information on planning a healthy pregnancy, see the topic Pregnancy.

    Source: 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.

    References

    Other Works Consulted

    • Bernstein HB, Van Buren G (2013). Normal pregnancy and prenatal care. In AH DeCherney et al., eds., Current Diagnosis and Treatment Obstetrics and Gynecology, 11th ed., pp. 141-153. New York: McGraw-Hill.
    • Katz VL (2008). Prenatal care. In RS Gibbs et al., eds., Danforth's Obstetrics and Gynecology, 10th ed., pp. 1-21. Philadelphia: Lippincott Williams and Wilkins.

    Credits

    By Healthwise Staff
    Sarah Marshall, MD - Family Medicine
    Kirtly Jones, MD - Obstetrics and Gynecology
    Last Revised June 21, 2013

    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. How this information was developed to help you make better health decisions.

    © 1995-2014 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.